Barnett Performance Products BSP-03 Warm Neoprene Cycling Overshoe, Bike Shoe Covers, black (XL) Ideal in winter, they protect you against slightly bad weather and can be used when temperatures are slightly below zero. Designed to give you comfort and performance Polyester and neoprene warm and waterproof Sizing: Small - up to EU40 ; Medium - EU40-45 ; Large: from EU45 onwards New system zipper