Black Crystal Hiking Ski Snow Gaiters Waterproof Breathable Nylon Men's Black Size Extra Large Upper portion 70D 3-layer waterproof breathable nylon fabric. Lower portion 1000D 3000mm CORDURA ultra-durable waterproof nylon fabric 15mm DURAFLEX aluminum buckles, smooth to pull Metal hook at the bottom to fasten to shoe lace Dual locks for front closure, use strap at top and Velcro zipper Instep straps use roller buckles to fasten, professional grade TPU for enhanced durability