The Undercover Boost features a shape and profile thats sensibly designed for smooth positional shifts on and off the saddle - elevated performance comfort for any mountain applicationBio-X is a padding system shaped to complement the body`s natural anatomical riding positions, resulting in some areas benefiting from extra cushioning and others with less just as it is with the human bodyUnique cutouts on the base designed to compress upon impact and quickly rebound for continuous shock absorptionOffered with Titanium rails and lighter SL padding, or Hollow Chromoly rails with ReActiv padding for improved comfortChromolyBio X-Pad ReActivBlack285mmx140mm255gUnisexUPC/EAN/GTIN: 840511041228