Kenetrek Men's Mountain Extreme 400 Insulated Hunting Boot 100% Leather Rubber sole TOP GRAIN LEATHER - One piece vamp of 2.8 mm top grain leather with no seams down the tongue for better abrasion resistance and waterproofing. EXTRA SUPPORT - 7mm nylon midsoles provide extra support in rugged terrain with heavy loads. INSULATED - Wind-tex waterproof breathable flexible membrane and 400 grams of Thinsulate insulation. TRACTION - Lightweight K-talon outsoles provide excellent traction, no matter the conditions. COMFORTABLE - Reinforced rubber sole guard for extra abrasion resistance. Lightweight and comfortable.