The fi"zi:k Gobi XM Saddles feature a Tail Flex rear portion offering a smoother transition on and off the saddle, as well as flexibility and shock absorption.Wing Flex: shell flexes downward where the inner thigh contacts the saddle allowing more efficient pedalling and full range movementTwin Flex: Kevlar/carbon shell is bonded to a stiff outer shell and provides a hammock-like feeling; sweet spot for pressure distribution in the perineal regionNylon carbon reinforced shellIntegrated Clip System (ICS): tool-free interface in the saddle"s base that allows quick attachment and removal of fi"zi:k pa:ks and blin:k lights. ICS is found on all saddles unless notedK:ium Rail: special alloy with a high strength-to-weight ratio and excellent vibration damping; 8% weight reduction compared to solid titaniumItem SpecificationsColorBlackWeight229gWidth130mmLength290mmGenderMen"sRailKiumClamp StyleStd RailsDefined ColorBlack