An adjustable buckle over an extendable gusset in the back offers a customizable fit in this moisture-wicking, antiodor, waterproof rain boot. Waterproof: protects against rain, puddles and slush to keep feet dry in wet conditions DuraFresh natural bio-technology helps to prevent odor BOGS Max-Wick evaporates sweat to keep feet dry Algae-based EVA footbed with arch support Temperature comfort rated to -58°F/-50°C Rubber and textile upper/textile lining/rubber sole Imported