Sidi ST Boots Black/White, SIS-STS-BKWH-44 Double stitched in all high stress areas. Sidis exclusive cam-lock buckle system for easy entry and boot removal while still offering a perfect glove like fit. Bolt on, replaceable, adjustable and aerodynamic nylon scuff pads on the toe with DuPont polymer toe shift pad. Closable air vents on the foot outer. Replaceable, Shock absorbing heel cup.