The waterproof leather and 1,000 denier Cordura upper of the 6" Series 100 WP SZ 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 100 Series is a great value in footwear. Propper footwear was designed for long lasting comfort and durability.