The Storm Heated Mitten is 100% waterproof with a reinforced palm and a rugged wrist cinch closure to keep it securely in place and deliver all-day comfort, warmth, and protection from the elements. Designed and engineered with the avid skier, snowboarder, or outdoor enthusiast in mind. Don't let your next adventure be cut short by cold, wet hands, and by integrating our Mobile Warming Technology into the 500 Denier Poly-Oxford outer and 100% soft polyester fleece liner, the Storm Heated Mitten lets you do what you love without sacrificing warmth or comfort. With heating capabilities up to 8 hours on a single charge, you'll never be forced back inside due to weather, keeping you after it longer, whether it's on fresh powder in the backcountry or a black diamond during the opening season. The split pack rechargeable Lithium-Ion battery is UL/CE certified to meet the highest safety standards.