Your hands will never want to leave this ultra-warm hunting muff featuring Heat Boost graphene technology, the next generation of advanced fabrics. The muff is made with a thick knit jersey in Vertek camo with a DWR finish that repels light snow and moisture. The interior is fully lined with Heat Boost graphene sherpa, a fabric enhanced with graphene's properties of thermal conductivity, wicking abilities, and antibacterial capabilities. Knitting graphene yarn into our sherpa lining supercharges it, making a warm material even warmer - 30% warmer. Slide your hand inside and you'll feel the heat. Inner fleece cuffs at either end keep the cold air out and the warm air in. A fully adjustable strap makes the muff easy to keep in place, and a pocket holds your gear. Cold fingers are a thing of the past.1 Year Limited warranty