The cold can't keep us from our bike, and the Celsius R GTX Cycling Shoe helps us ward off frigid winter temperatures with a GORE-TEX Rattler membrane and an Easyfit Climaflex collar. Made with neoprene, the collar keeps our ankles warm while thermal insulation in the shoe works to keep our toes from freezing. An EVA midsole improves comfort, and a stiffness index of 8. 0 improves power transfer.