ScentLok BE:1 Handwarmer Waterproof Hunting Muff 70197022811 Stay warm and stay protected with the Bowhunter Elite:1 Handwarmer Muff. Packed with Carbon Alloy™ for adsorption, 200g of Primaloft® Gold insulation for warmth, WindBrake® windproof technology, a DWR finish to shed moisture, and 300g long nap fleece, the BE:1 Muff is the most advanced handwarmer we've ever produced! California Residents WARNING: Cancer and Reproductive Harm - ScentLok BE:1 Handwarmer Waterproof Hunting Muff