Helly Hansen Knaster 3 - Men's The Helly Hansen Knaster 3 is anaggressive-looking winter boot will take you anywhere, anytime in comfort and protection. Waterproof leather upper withHelly Wear Protection, a high abrasion TPR synthetic material that keeps your feet well protected against hard and sharp objects for a prolonged period of time. Fleece lining keeps you warm in cool conditions. Premium EVA midsole offers cushioning for long days on your feet. Helly Grip™ outsole was developed by combining experience from stormy water and rough outdoor trail for the best grip and durability on wet rocks and trails.