Design: Waterproof upper to keep feet dry and cozy Temperature rated to -25degF to ensure a warm wearing experience Bungee lace with toggle closure for a secure fit Heel pull tab for easy on and off In-Shoe Comfort: Soft recycled PET linings for added comfort Durability & Traction: Non-marking rubber outsole with extra grip for superior traction and durability Additional Details: 200g of insulation in upper lining and footbed Anti-stink lining helps reduce odors