The 500 revolutionized military footwear when it was first introduced using the VANGUARD premium cushioning sole system. Ideal for cooler and wetter conditions, the 500 is a supportive and reliable boot that features a GORE-TEX waterproof bootie to keep your feet dry and comfortable. Belleville Gore-Tex boots run about 1/2 size larger than your running shoe size. For example, if you wear a size 10, consider wearing a size 9.5. VANGUARD running shoe sole construction Durably waterproof and highly breathable GORE-TEX fabric CERTIFICATION #150M22-000541-6-49 Specifications Height: 8" (Standard Military Height) Upper: 100% cattlehide leather & nylon fabric Mdsole: Highly cushioned, shock absorbent midsole Outsole: 100% rubber VIBRAM Sierra Insole: Single density molded removable insert