The waterproof leather and 1000D Cordura® upper of the Series 100® Waterproof Side Zip Boot can be pulled snug with the quick and easy NATO speed lace system. A special gusset behind the zipper 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 Series 100® is a great value in footwear for street patrol/tactical, activity duty, safety professions and more. 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.