This lightweight mountain bike saddle is ultra-light with a FACT™ carbon fibre shell tuned for racing stiffness. The S-Works Phenom features a rounded anti-snag tail & the perfect amount of padding for all-day rides.> Patented Body Geometry design is lab tested to assure blood flow to sensitive arteries> Super-light EVA padding for comfort & support on longer rides> Low friction panels on the nose & tail improve pedalling efficiency & rider mobility while moving ‘on & off’ the back of the saddle> FACT™ carbon fibre shell is flex-tuned for support & ride compliance> Ultra-light & strong oversized FACT™ carbon rails> Level 2 padding: Medium density foam; bike feel with additional cushioning> NOTE: Oversized 7x 9mm carbon rails not compatible with seatposts equipped with side-load clamp mechanisms for 7mm round rails