Like Crocs with even thicker skin, our burly Expedition Crocodiles gaiters are designed to function on extended mountaineering trips, in cold weather and in extreme conditions. The large circumference provides more room for plastic mountaineering boots and heavily insulated pants, and the inside leg of each gaiter is made of durable Cordura fabric to prevent crampon snagging and puncturing when you&';re high in the mountains.Durable Waterproof Breathable Abrasion-Resistant Cordura Inner Leg and Boot Abrasion-Resistant Lower Boot Lined with Packcloth Larger Circumference Accommodates Plastic Boots 2Wide Hook and Loop Front Closure Hook and Loop Top Closure Double-Stitched Front Closure Bottom Shear Tab Secures Front Closure Durable BioThane Instep Strap