Waterproof overshoe for all Exped Camp Booties, Down Socks und Camp Slipper! The ultimate overshoe for basecamp, winter camping or just walking around camp in the woods. The durable sole is made of environmentally friendly TPU material and pulled up high around the sides as protection against ice, sharp edges and twigs. The padded heel is made of the same durable EVA foam of the inner sole and insulates when legs are stretched out on cold ground. Two adjustable elastic cords can be handled easily even with gloves to cinch the Bivy Booty tight. All seams are factory taped and the 3 layer outer shell(Exped VentAirA(R)) is highly vapor permeable. SPECIFICATIONS Avail_Size_Booties: S - Shoe size DE/EU 37 - 39, USA 5 -7 M - Shoe size DE/EU 40 - 42, USA 7 - 9 L - Shoe size DE/EU 43 - 45, USA 10 - 11 XL - Shoe size DE/EU 46 - 47, USA 12 - 13 Warranty: 5 years