Dri-Lex lining provides excellent vapor transport, is extremely quick drying, is completely breathable, resists odor and mildew in hot weather. Rough out, full-grain leather upper offers serious protection and toughness and is designed specifically for hot weather conditions, providing mildew resistance, breathability, and low water absorption. 1000 Denier nylon upper material is extremely resistant to abrasions, tears, and scuffs, improves breathability, and dries quickly.