Optimized waterproofing and heat retention. The quiet and rugged RPET DURAWEAVE ULTRA outer, married with an Amara leather palm grip, provides premium durability and grip for extreme terrain. The Hydrafuse GRA-SP internal waterproof membrane is extremely waterproof and breathable to offer your hands complete shielding from external water sources while promoting sweat vaping. SPLITfibre synthetic fill insulation offers maximum warmth with continued performance properties when water does find it’s a way in from the inside of the gloves. The Blizzards are designed for maximum performance in extreme conditions.