The ultra-light S-Works Power saddle is Body Geometry designed for both men and women to have top performance in a more aggressive position. Proven through blood-flow testing and pressure mapping, the extra wide and elongated Body Geometry channel and proper sitbone support allows for all day comfort. Patented Body Geometry design is lab tested for both men and women to assure blood flow to sensitive arteries Stiff FACT™ carbon fiber shell tuned for support and ride compliance Super-light PU padding for comfort and support on longer rides Ultra-light and strong oversized FACT™ carbon rails Tough, light and water resistant cover Level 1 padding: Lightest level of padding; most direct connection to the bike SWAT compatible mounts co-molded into the saddle base allow for sleek and integrated storage solutions Size 143mm/ Weight 159g Size 155mm/ Weight 161g NOTE: Oversized 7x9mm carbon rails are not compatible with seatposts equipped with side-load clamp mechanisms for 7mm round rails