Designed to position the rider for optimal power transfer & comfort; its Body Geometry channel maximises blood flow. Patented Body Geometry design is lab tested to assure blood flow to sensitive arteries Stiff carbon reinforced shell for longevity & all-day riding efficiency Lightweight & supportive PU foam with gel inserts for increased comfort over longer rides Lightweight & durable hollow titanium rails Tough light weight & water resistant Micromatrix cover Size 143mm/ Weight 218g Size 155mm/ Weight 226g Size 168mm/ Weight 233g