This hand warmer uses high-tech Therma-FIT technology and stretchy knit cuffs to help lock the heat in. Attach it to your waist with the quick-release belt and throw a heat pack into the internal pocket for an extra blast of warmth. Product Details 76% polyester/12% polypropylene (PP)/ 10% polyoxymethylene (POM)/2% nylon Spot clean Imported