Giordana SottoZero Cycling Shoe Cover - gi-w0-shco-soze heavy duty Neoprene shoecover It features a reflective CamLock zipper on the heel for visibility The warmest of the new collection, the SottoZero is a heavy duty Neoprene shoecover that will keep y A Velcro ankle closure allows easy adjustment on the bike Small (37-39), Medium (40-42), Large (43-45), XLarge (46-48)