The Perfect Storm Cloud Mid women's boot is 100% waterproof from top to bottom. The boot is fully insulated with 7 mm neoprene to keep you warm in the coldest conditions. It is comfort rated to -30F. The non-marking, non-slip outsole delivers superior traction while the removable EVA insole adds cushioning. The Perform Shield® Handle keeps unwanted seasonal elements out. It features anti-microbial odor protection lining materials.