100% waterproof and breathable GORE-TEX liner is engineered to keep your feet dry and comfortable - even in extreme conditions. 200 grams of Thinsulate Insulation offer lightweight warmth for those needing protection in cold climates. Full-grain leather can be easily polished and is preferred by those in uniform and on special tactical teams due to its durability and ability to be cleaned quickly. The heel provides lightweight comfort as well as superb shock absorption.