Selle Italia Flite Boost Saddle. Features: Classic Flat shape that has always distinguished the Flite family, combined with the more compact design of the Boost geometry TI 316: 7mm rails are hollow titanium, a balance of strength and light weight Manganese: 7mm rails made of a Managanese and CrMo alloy for excellent durablilty and value Fibra-tek: Selle Italia's latest cover material offering supreme durability and comfort Soft-Tek: Polyurethane cover for high levels of comfort and durability For more information on idmatch visit http://www.selleitalia.com/en/idmatchsystem/ Specs: Model:Flite Boost Idmatch:S3 Rails:TI 316 Top:Fibra-Tek Color:black Lx W Mm:248x135 Weight:210g