This lightweight mountain bike saddle is features a FACT™ carbon fiber shell tuned for racing stiffness. With a rounded, anti-snag tail and the perfect amount of padding, it's more than ready for rides that last the whole day. •Patented Body Geometry Design is lab tested to assure blood flow to sensitive arteries. •Super-light, EVA padding for comfort and support on longer rides. •Low friction panels on the nose and tail improve pedaling efficiency and mobility while moving ‘on and off’ the saddle. •FACT™ carbon fiber shell is flex-tuned for support and ride compliance. •Ultra-light and strong, oversized FACT™ carbon rails. •Level 2 padding: Medium density foam for bike feel with additional cushioning. •Size 143mm / Weight 153g •Size 155mm / Weight 165g •NOTE: Oversized 7x9mm carbon rails are not compatible with seatposts equipped with side-load clamp mechanisms for 7mm round rails.