Heatlok Deerskin Thermal Gloves-Black-Size 11 XL These gloves are constructed of soft Black Genuine Deer Suede Leather palms with High-Tech Black Polyester Fleece backs and are fully insulted with HeatLok TM to ensure warmth. Heatlok is a high-tech patented system of hollow fibers and microfiber that provides warmth without excess bulk or loss of dexterity. The Heatlok system "traps" air creating a thermal barrier keeping the warmth in the gloves. Heatlok is also windproof! The underside and palm portion of the gloves are made of genuine deerskin leather suede, with a reinforced section across the palm. The exterior back portion of the gloves are soft low nap high-tech polyester fleece for stretchability, added comfort and warmth. The interior of the gloves are also lined in warm soft low nap high-tech polyester fleece. A thick layer of HeatLok TM Thermal Insulation helps to keep the cold out and your hands warm. These gloves also feature an elastic band at the wrist for a snug warm fit. Machine washable! Just turn gloves inside out and hang dry!