- ADAPTIVE: Carbon Digital Light SynthesisTM 3D printing technology, offering seamlessly engineered zonal cushioning - VERSUS EVO: full channel design for pressure relief on soft tissue area - A combination of a high module full carbon shell and a carbon rail for ultimate stiffness and lightness - MOEBIUS RAIL: (7 x 10mm) patented closed-loop design for a balanced weight distribution - Easy to clean - Saddle Weight: 147g

An ultra-light aero road saddle with a full cutout that maximizes power and minimizes soft-tissue pressure for sustained comfort. Streamlined for speed, sculpted for comfort Aeolus RSL brings comfort, power, and speed to cyclists looking to dig deep and rotate further forward into more aero positions. The Race Shop Limited design was developed with racers of Trek Factory Racing using uber-light carbon rails and shell that meld together with minimal padding for a saddle that looks fast as it rides. A shorter overall length, wider nose, and full cut-out eliminates soft-tissue pressure. Product details - Race Shop Limited design was developed for the needs of Trek Factory Racing - Short profile provides targeted support for any gender rider in an aero riding position - Full saddle cut-out minimizes soft-tissue pressure allowing for a more powerful, rotated position - Carbon shell and oversized carbon rails keep it uber-light and ultra-comfortable - Minimal bonded padding shaves weight and creates a sleek, high-end aesthetic - Two sizes designed to align saddle with bone structure and avoid soft-tissue compression Features: Aeolus RSL Bicycle Saddle Aeolus RSL utilizes the latest biomechanical research and a full cutout design to eliminate soft tissue pressure and maximize power and comfort for riders in an aero position. Longer cutout The split design of the full saddle cut-out extends from the nose through to the rear of the saddle to minimize soft tissue pressure and allow for a more powerful, rotated position. Wider nose Aeolus has a wider nose with a shorter overall length that ensures the whole saddle is usable and comfortable, whether you’re sitting up on the hoods or hammering in the drops. Fit for any rider Aeolus is designed and tested to work well for a wide range of riders of any body type and gender, and is available in multiple sizes to provide the best individual fit. Blendr integration You can get a Blendr accessory mount that attaches securely to the rear of this saddle for clean integration with any Bontrager Flare rear light. There's still enough allowance for a seat pack, too. Initial setup tips Aeolus is optimized for the best fit and performance, so it’s slightly shorter than a traditional saddle. When swapping out your old saddle, we suggest starting with an extra 10mm of setback from the nose and a 2 degree downward tilt.

- Adaptive: Carbon Digital Light Synthesis 3D printing technology, offering seamlessly engineered zonal cushioning - Versus Evo: Engineered with a degree of flexibility and a full channel design for pressure relief on soft tissue area - R1: A combination of a ride compliant carbon-reinforced nylon shell and a highly stiff carbon rail - Intended use: road racing - Easy to clean

- Adaptive: Carbon Digital Light Synthesis 3D printing technology, offering seamlessly engineered zonal cushioning - Versus Evo: Engineered with a degree of flexibilty and a full channel design for pressure relief on soft tissue area - R3: A combination of a ride compliant carbon reinforced nylon shell and a Kium hollow rail with high strength-to-weight ratio grad - Intended use: road racing - Easy to clean

The Antares shape is wide and slightly curved in profile which is ideal for riders with medium spine flexibility. The Antares R1 benefits from improved weight distribution and a host of fi'zi:k technologies including a carbon double shell and Braided Carbon Rail, for the optimum blend of strength, support and light weight, and Wing Flex which enables flexibility where your thighs meet the saddle. - Composite Carbon co-injected Nylon WingFlex Shell - Carbon Braided 7x9mm rails - Black Gummy Microtex Cover - Black Microtex Thigh Glides - Integrated Clip System compatible Regular: - Dimensions: 275mm x 141mm - Weight: 160g Large: - Dimensions: 275mm x 152mm - Weight: 16 g

Elegant, slight curves accentuate this inviting shape that redefines what comfort is capable of at such a low weight. From where the pavement ends, to B-road pursuits and cyclocross run ups, our SL8 saddle provides irrefutable comfort in a minimalist, svelte package. - Narrow, tapered nose and midsection minimize chafing during longer pedaling sessions - Short overall length for seamless on-off transitions - Thin, lightweight padding keeps the overall weight down - Carbon rails, 7mm x 9mm

The Silverado is one of WTB’s most iconic and revered saddle shapes. Lightweight and slim, the design oozes speed while proving to be incredibly comfortable. Ride a Silverado and you’ll quickly know what everyone’s raving about. - Long, tapered nose and flatter platform provide ample real estate for shifting positions - Optimized padding-to-weight ratio make the Silverado a hit across all disciplines, including road - Carbon rails, 7mm x 9mm

The Volt is our most popular mountain saddle. Shaped for speed and comfort, time tested and proven, the Volt makes for an incredibly versatile saddle that has gained endless acclaim among riders. - Medium padding thickness and subtle curves make the Volt our most popular mountain saddle - An upward curved tail and gentle drop to the nose provide something to push against while pedaling - Carbon rails 7mm x 9mm

Comfort without sacrificing power Aeolus Pro brings comfort, power, and speed to road riders looking to dig deep and rotate further forward into a more aero position. This uber-light, race-ready saddle was tested and pressure mapped with male and female athletes for the ultimate in proven performance. A shorter overall length with a wider nose and full cut-out ensure targeted support that eliminates soft-tissue pressure for both men and women. Product details - inForm saddles are born of cutting-edge biomechanical research to maximize performance and rider comfort - Designed to support riders in an Aero Road riding position - Full saddle cut-out minimizes soft-tissue pressure allowing for a more powerful, rotated position - Two sizes designed to align saddle with bone structure for both men and women and avoid soft-tissue compression - Oversized carbon rails for lightweight strength. Specific seatpost ear clamps required - Lightweight carbon-reinforced shell provides perfect balance of weight, strength, and compliance - Minimal Pro-level padding offers sleek profile that shaves weight - Available Blendr accessory mounts to cleanly integrate rear light

Versatile and ultra-light, the Verse Pro gets a shorter profile for elevated comfort for riders of all genders and disciplines. Less is more A shorter profile elevates comfort across all riding positions for the top trim level of our most versatile performance saddle. Verse Elite’s targeted support and versatile design is ideal for all riders and genders. Carbon rails and a composite shell keep it ultra-light with added compliance. A full cutout ensures long-haul comfort, and Wing Flex allows the saddle shell's side edges adapt to riders’ inner leg movements and pelvic rotation. Product details: - Short profile provides targeted support for riders of any gender in a performance riding position - Wing Flex allows the shell's edges to adapt to rider's inner legs movement and pelvic rotation - Full saddle cutout minimizes soft tissue pressure for lasting comfort and performance - Lightweight carbon-reinforced shell perfectly balances weight, strength, and compliance - Oversized carbon rails for lightweight strength (specific seat post ear clamps required) - Multiple widths and extended rail clamping area give more fit options - inForm saddles are born of cutting-edge biomechanical research to maximize performance and rider comfort - Blendr accessory mounts offer clean integrated mount for rear Flare light Features: For men, for women, for mountain, for road. Verse Short is designed to add comfort for all genders. It's your go-to performance posture saddle for both trail and road. Short profile The short profile provides targeted support and a performance riding position for all genders. Wing flex Wing flex allows the saddle shell's side edges to flex and adapt to a rider's inner leg movement and pelvic rotation. Full-length cutout A full saddle cutout minimizes soft tissue pressure for lasting comfort and performance. Blendr integration Easily mount Bontrager Flare rear lights with the Blendr accessory mount, available separately.

VENTO ARGO R1 is a performance racing saddle with a short-nose design that improves stability and allows for a more aggressive, aero riding position. Where a traditional saddle shape encourages riders to shift their position frequently for better leverage, Argo puts the rider in a more planted position, making for greater stability and better weight distribution. Vento Argo's short length allows the rider to sit further forward without placing undue pressure on sensitive tissues. It also features an ergonomic cutout that was developed using detailed pressure analysis and input from medical experts. Argo is our most versatile saddle shape and each version suits different riding styles. As the racing option, Vento Argo has been engineered to deliver a riding feel that suits race bikes with aggressive geometry. The padding is made from fizik's proprietary Type 1 foam formulation, which has a lower profile and is reactive and springy for instantaneous response and optimal power transfer. The purposeful shape of its design helps you achieve a better riding posture: the dropped nose supports the pubic ramus when the pelvis rotates forward to add power or to get more aero. Argo is a product of the fizik Concepts program, a cross-disciplinary collaboration of leading industry experts and academics carrying out research and analysis on technology, design, physiology, and bike-fitting in search of ways to improve cycling performance. - Argo: a versatile short-nose saddle that encourages stability and relieves pressure on soft tissue area - R1: a combination of a ride-compliant carbon-reinforced nylon shell and a highly stiff carbon rail - Type 1 foam: low-profile, reactive and springy for efficient power transfer SPECIFICATIONS: VENTO ARGO R1 140 - Length: 265mm - Width: 140mm - Weight: 179g - Height at 75mm width: 41mm - Length from nose to 75mm width: 114mm - Rail: 10 x 7mm SPECIFICATIONS: VENTO ARGO R1 150 - Length: 265mm - Width: 150mm - Weight: 186g - Height at 75mm width: 41mm - Length from nose to 75mm width: 114mm - Rail: 10 x 7mm

A saddle that moves with you, the flexible performance of the C13 158mm saddle comes from its vulcanized natural rubber and nylon top that is also durable and waterproof creating a saddle that is very light, yet comfortable. This is accomplished through a continuous carbon rail that increases strength and durability while eliminating performance-resistant contact points. Events like Paris-Brest-Paris, the Transcontinental, or the Silk Road Mountain Race require a comfortable saddle made for long distance cycling. The C13 158mm is the optimal width for cycle touring, brevet challenges, or audax races, or simply for anyone who wants a light and comfortable saddle for local racing or group rides. Materials - Carbon frame - Naturally flexible rubber - Moves with you - All-surface vibration absorption - Continuously comfortable - UV & abrasion resistant - Weatherproof nylon cover Specifications - Length: 275mm - Width: 158mm - Height: 55mm - Weight: 310g

The carbon framed, Cambium C13 All Weather utilizes waterproof nylon on its vulcanized natural rubber top for added durability and increased flex, offering truly waterproof performance for high-mileage, all-season cyclists. The Carbon C13 is the lightest Cambium in the range and features a uniquely flexible top to absorb shocks and vibrations for better comfort and control. The carved version features a hole for increased flexibility and pressure relief whilst racing or cycling up to middle distances. - Oval carbon rails - Made in Italy - Length: 275 mm - Height: 55 mm - Weight: 259g (132mm) / 280g (145mm)

TEMPO ARGO R1 is a versatile endurance road saddle with a short-nose design and generous ischial support that encourages stability. Where a traditional saddle shape encourages riders to shift their position frequently for better leverage, Argo puts the rider in a more planted position, making for greater stability and better weight distribution. Tempo Argo's short length allows the rider to sit further forward without placing undue pressure on sensitive tissues. It also features an ergonomic cutout that was developed using detailed pressure analysis and input from medical experts. Argo is our most versatile saddle shape and each version suits different riding styles. As the endurance riding option, Tempo Argo has been engineered to deliver a riding feel that suits the balanced geometry of today's all-purpose road machines. The padding is made from fizik's proprietary Type 2 foam formulation, slightly thicker around the ischial sit bones area to support a more upright riding posture. The cushioning is slightly softer and more progressive than the type we use on our racing saddles, providing more long-distance comfort. Argo is a product of the fizik Concepts program, a cross-disciplinary collaboration of leading industry experts and academics carrying out research and analysis on technology, design, physiology, and bike-fitting in search of ways to improve cycling performance. - Argo: a versatile short-nose saddle that encourages stability and relieves pressure on soft tissue area - R1: a combination of a ride-compliant carbon-reinforced nylon shell and a highly stiff carbon rail - Wingflex: the shell's side edges flex and adapt to the rider's inner leg movement - Type 2 foam: progressive cushioning, with lower compression modulus SPECIFICATIONS: TEMPO ARGO R1 150 - Length: 260mm - Width: 150mm - Weight: 195g - Height at 75mm width: 43mm - Length from nose to 75mm width: 103mm - Rail: 10 x 7mm SPECIFICATIONS: TEMPO ARGO R1 160 - Length: 260mm - Width: 160mm - Weight: 202g - Height at 75mm width: 43mm - Length from nose to 75mm width: 103mm - Rail: 10 x 7mm

The Butterfly Carbon is the lightest of the Butterflies thanks to the addition of carbon rails. It's wider in the rear than typical saddles for good support of a woman's sit bones. The Butterfly Carbon's low profile, flat top, and a complete cutaway through the center are designed to provide pressure relief and support in the right areas. Injection-molded foam is used to provide the right balance of softness and stiffness so you won't sink into the saddle the longer you ride. - Black leather with gloss butterfly graphic and patent leather rear - Signature Butterfly cutaway through the center of the saddle for pressure relief - Length x width: 262mm x 155mm - Weight: 218 grams; 7.7 ounces - Rails: lightest weight Carbon 10mm H (+/- .5mm) x 7mm W (+/- .5mm) note: check seat post for compatibility as it may require an adapter kit (available from some seat post manufacturers)

With an anatomic cut-out shape and advanced technology, materials and craft, Arione R1 Open Large is a leading performance road saddle for riders who want a flat saddle profile and a cut-out to avoid pressure and numbness. Made for Snake riders with high body flexibility and no pelvic rotation while pedaling, the Arione is longer than any other fi'zi:k road saddle, flat from nose to tail and with a narrow nose, so you can move around to find your power spot. The Large model is the wider of the two options. Arione R1 Open features a composite Carbon-reinforced nylon shell and a light, strong, Braided Carbon rail. A Comfort avoids pressure on the rider’s sensitive soft tissue and ensures that all weight is correctly supported across the whole surface of the saddle. Like all performance fi’zi:k road saddles, Arione R1 Open is light, flexible and agile. It's designed for pros, with pros and raced by pros. With an anatomic cut-out shape and advanced technology, materials and craft, Arione R1 Open is a leading performance road saddle for riders who want a flat saddle profile and a cut-out to avoid pressure and numbness. - Open central cutaway - Shell: Carbon-reinforced nylon - Rail: 7x9mm Carbon Braided - Cover: Microtex - Dimensions: 300x142mm - Weight: 205 grams - Integrated Clip System compatible - Spine Concept: Snake

An ultra-light performance saddle with a carbon-reinforced shell and a full cutout for targeted support and soft tissue pressure relief for riders of all genders and disciplines. For mountain, for road, for men, for women Our most versatile performance saddle puts you in a power posture for speed and control wherever you ride. Verse Pro is built with ultra-light, oversized carbon rails, a carbon-reinforced shell, and an inForm design with a full cutout shape for the ultimate in comfort and performance. Plus, it's equipped with a rear-facing Blendr mount for a Flare tail light. Product details - Saddle design supports riders of all genders in a performance riding position on road and mountain bikes - Full saddle cutout minimizes soft tissue pressure for lasting comfort and performance - Oversized carbon rails for lightweight strength (specific seat post ear clamps required) - Lightweight carbon-reinforced shell provides perfect balance of weight, strength, and compliance - Multiple widths and extended rail clamping area give more fit options - inForm saddles are born of cutting-edge biomechanical research to maximize performance and rider comfort - Available Blendr accessory mounts to cleanly integrate rear light

Seated pressure relief for male road cyclists in a lightweight carbon package. Flat contour, yet still comfortably padded. The overall shape and the relief channel with its deep cut-out perfectly match the male anatomy in a low, forward-tilted riding position typical of road cycling. The highly sensitive perineal area is effectively unloaded, preventing any discomfort. OrthoCell-Inlays in the seating area generate the best possible pressure distribution. The innovative OrthoCell material ensures maximum reset forces and is also more durable and lighter than gel. - Lightweight at only 195 grams (size S/M).

In designing the Corta saddle for women, we endeavored to create an entirely new shape for performance riders whose riding style has evolved. Maybe you're more competitive, riding longer distances, or have a new bike that you can't get comfortable on – this snub-nose style saddle could be your solution. The Corta has a shorter overall length and a dropped nose which combine to eliminate excess surface area, prevent chafing, and alleviate pressure. We've also engineered it with our largest cutaway for the greatest relief channel possible. It's supportive and flat at the rear so you have a good platform for sustained, seated climbs. Aesthetically, the Corta is a streamlined beauty with textural detail and state-of-the-art technology. If you're ready to step up to the latest in technology, Terry comfort engineering, and high-performance design, Corta was made for you. - Seamless bond between Dura-tek cover and micro-suede panels provides a smooth contact surface to reduce chafing - Screen-printed graphics and perforations - Largest cutaway in the Terry saddle line - Length x width: 250mm x 149mm - Weight: 235 grams - Rails: Ti-316

Terry's longest distance, lowest profile, widest cutaway Butterfly with something extra: Poron XRD. Designed to take comfort up a notch for endurance riding, the Butterfly Century is engineered with a layer of Poron XRD shock absorbing material between the saddle’s base and foam layers. The Poron XRD reduces road shock and allows for a thinner layer of foam and a narrower overall saddle profile, without loss of rider comfort. A larger foam cutout provides greater soft tissue relief. Additionally, the Century features a thin layer of gel along the top, a wider cutaway, sculpted foam for pressure relief in key areas, and a seamless Fibra-tek cover that reduces the incidence of high cadence chafing. - Fibra-tek cover with Poron XRD shock-absorbing layer - Widest cutaway in the Butterfly line up for maximum pressure relief - Length x width: 262mm x 152mm - Weight: 268 grams; 9.5 ounces - Rails: Ti-316

Arione R3: the Arione is longer than any other saddle, flat from nose to tail and with a narrow nose, so you can move around to find your power spot. The Arione R3’s Composite Glass co-injected Nylon shell provides the best support with optimized stiffness to-weight construction – with Wing Flex technology which enables flexibility where the rider's thighs meet the saddle – and an alloy K:ium rail for light weight. - Shell: Composite glass co-injected Nylon WingFlex - Rail: K:ium - Cover: Thermowelded Microtex - Thigh Glides: Thermowelded Black Microtex - Weight: 200 grams - Dimesions: 300x130mm - Integrated Clip System compatible - Spine Concept: Snake

Comfort without sacrificing power Aeolus Elite brings comfort, power, and speed to road riders looking to dig deep and rotate further forward into a more aero road position. It's the go-to race saddle for both men and women who want to comfortably get the most out of their aero road bike. A shorter overall length with a wider nose and full cut-out ensure targeted support that eliminates soft-tissue pressure. Product details - inForm saddles are born of cutting-edge biomechanical research to maximize performance and rider comfort - Designed to support riders in an Aero Road riding position - Full saddle cut-out minimizes soft-tissue pressure allowing for a more powerful, rotated position - Two sizes designed to align saddle with bone structure for both men and women and avoid soft-tissue compression - Austenite rails are lighter and stronger than hollow Titanium - Lightweight shell provides balance of weight, strength, and compliance - Elite-level trim optimizes foam padding for added lightweight comfort - Available Blendr accessory mounts to cleanly integrate rear light

Road ready, trail approved Arvada Elite adds comfort and reduces soft tissue pressure by creating a strategic cut-out in the saddle shell. This allows the softer finishing material across the shell cut-out to be more compliant, so you get the benefits of a cutout saddle with the classic look and feel of a more traditional design. Key features - Performance Posture 3 for pelvic rotation with a balance of comfort and efficiency - Channel Flex on bottom of shell for added compliance - Zone Density shell construction is strategically placed for optimal comfort and performance - Size Specific Curvature ensures each saddle is designed specific to its width - Austenite rails are lighter and stronger than hollow Titanium - inForm BioDynamic products optimize your natural movement for sustained, higher performance

A light and versatile saddle with a shorter profile for targeted comfort, perfect for riders of all genders and all disciplines. Comfort in a compact package Verse Short Elite brings comfort to any riding position thanks to a lightweight package and targeted support, backed by a versatile design that’s optimized for any rider, any gender, and any discipline. A full cutout provides long-haul comfort and Wing Flex allows the saddle’s edges to flex and adapt to riders’ inner leg movement and pelvic rotation. Product details: - Short profile provides targeted support for riders of any gender in a performance riding position - Wing Flex allows the shell's edges to adapt to rider's inner legs movement and pelvic rotation - Full saddle cutout minimizes soft tissue pressure for lasting comfort and performance - Featherweight shell with Austenite rails that are lighter and stronger than hollow titanium - Elite-level trim optimizes foam padding for added lightweight comfort - Multiple widths and extended rail clamping area give more fit options - inForm saddles are born of cutting-edge biomechanical research to maximize performance and rider comfort - Blendr accessory mounts offer clean integrated mount for rear Flare light Features: For men, for women, for mountain, for road. Verse Short is designed to add comfort for all genders. It's your go-to performance posture saddle for both trail and road. Short profile The short profile provides targeted support and a performance riding position for all genders. Wing flex Wing flex allows the saddle shell's side edges to flex and adapt to a rider's inner leg movement and pelvic rotation. Full-length cutout A full saddle cutout minimizes soft tissue pressure for lasting comfort and performance.

A versatile trail saddle with a shorter profile that gives targeted comfort to riders of all genders and all disciplines. Trail-ready comfort and performance Verse Short Elite Trail Saddle takes comfort to the trail with a lightweight yet durable design that offers targeted support for all riders, all genders, and any off-road discipline. The short profile with a full cutout provides lasting comfort and Wing Flex allows the saddle’s edges to flex and adapt to riders’ inner leg movement and pelvic rotation. Product details: - Short profile provides targeted support for riders of any gender in a performance riding position - Wing Flex allows the shell's edges to adapt to riders' inner leg movement and pelvic rotation - Full saddle cutout minimizes soft tissue pressure for lasting comfort and performance - Featherweight shell with Austenite rails that are lighter and stronger than hollow titanium - Rugged finishing materials combine with Elite-level foam for lightweight comfort and durability - Multiple widths and extended rail clamping area give more fit options - inForm saddles are born of cutting-edge biomechanical research to maximize performance and rider comfort - Blendr accessory mounts offer clean integration of a Flare tail light For men, for women, for mountain, for road. Verse Short is designed to add comfort for all genders. It's your go-to performance posture saddle for both trail and road. Features: Short profile The short profile provides targeted support and a performance riding position for all genders. Wing flex Wing flex allows the saddle shell's side edges to flex and adapt to a rider's inner leg movement and pelvic rotation. Full-length cutout A full saddle cutout minimizes soft tissue pressure for lasting comfort and performance. Blendr integration Easily mount Bontrager Flare rear lights with the Blendr accessory mount, available separately. Crash resistant Verse Short Trail Elite features an abrasion-resistant coating to protect your investment in case things get too rowdy on the trail.

Leave it up to Brooks to improve on a classic. The women's B17 S Imperial features a design that dates back to 1890, with a pressure reducing cutout that ensures your comfort in the miles to come. And, of course, the B17 S Imperial features Brooks' full-grain, premium leather, and trademark rivets for the ultimate in comfort, style, and durability.

Globally renowned and truly timeless, the B17 Standard is the saddle that secured Brooks' place in cycling history. It's been in constant production since 1910, providing cyclists around the world with over one hundred years of sublime support and unrivaled comfort. Each B17 Standard shapes itself to its rider, leading to a personal, customized saddle that fits like no other. And of course, it features Brooks' full grain, premium leather top secured by their trademark rivets for the ultimate in style, comfort, and durability.

Ergon SC Core prime saddle is adapted for city and comfort touring bikes. This effect of putting far less strain on your back has been awarded with the seal of quality of “Campaign for Healthier Backs“. Ergon Ergonomics Laboratory has worked hard to optimize the saddle’s surface design for the anatomical requirements of a very upright riding position. The pronounced relief channel further assists in preventing feelings of numbness and related seating issues. - Soft, orthopedic comfort foam covered with a heavy-duty microfiber surface - The heart of the relief system—the core supports the natural movement of the hips and dampens the effect of constant bumps - Gender: Women's - Rail Material: Steel - Clamp Style: Standard Rails - Material: Synthetic

Ergon SC Core prime saddle is adapted for city and comfort touring bikes. This effect of putting far less strain on your back has been awarded with the seal of quality of “Campaign for Healthier Backs“. Ergon Ergonomics Laboratory has worked hard to optimize the saddle’s surface design for the anatomical requirements of a very upright riding position. The pronounced relief channel further assists in preventing feelings of numbness and related seating issues. - Soft, orthopedic comfort foam covered with a heavy-duty microfiber surface - The heart of the relief system—the core supports the natural movement of the hips and dampens the effect of constant bumps - Gender: Men's - Rail Material: Steel - Clamp Style: Standard Rails - Material: Synthetic

The patented Core design allows the saddle to effortlessly follow pelvic movements – enormously reducing pressure on the sit bones and genital area. The floating TwinShell concept with the ergonomic core supports the natural pelvic movements while pedaling, actively relieves the sit bones, and reliably dampens bumps caused by the riding surface. - S/M fit sit-bone width of 9-12cm, M/L fits 12-16cm - Saddle shell made of Nylon Composite - 220 lb recommended max rider weight limit