Defeet Slipstream Shoe Covers are designed to wear over your cycling shoes to protect you against the cold and provide an aerodynamic advantage.Stayfast cuff for a comfortable, durable, no snag fit.Achill-E-Shield reinforcement extends durability in high-stress areaEn-Duro-Skin construction places Cordura nylon on outside of shoe cover for maximum durability, abrasion resistance, and wind deflectionCut guide for cleatFour-Season usageCudura constructionItem SpecificationsColorBlackMaterialCuduraShoe SizeSm/Md