Original SWAT has done two very important things with the introduction of this fine line of boots. First, by developing an all new 'last' - drawing heavily on European comfort footwear technology to get an orthotically correct shape. Second, by using modern materials an technology usually found in athletic footwear manufacture. The result is a product that has changed the uniform boot market and forever setting new standards in fit and comfort. Leather and 1100 Denier Nylon Upper YKK Zipper with VELCRO® Tab Low-profile, Slip-resistant Outsole Air Cushion-P.U. Midsole Airport-Friendly Non-metallic Shank Synthetic Moisture Wicking Lining Heel Counter Weight: 39oz (size 9 pair)