The waterproof leather and 1000D Cordura upper of the AR 670-1 compliant Series 100 8" Waterproof boot can be pulled snug with the quick and easy NATO speed lace system. A special gusset helps keep water out while the triple density rubber foundation and an arch made from a durable compound will hold up to the rigors of fast-roping. The 100 Series is a great value in footwear. Propper footwear was designed for long lasting comfort and durability. All of our boots are based on true U.S. sizing to provide the perfect fit.