Add comfort to chilly days and nights and, in an emergency, protect yourself from frostbite with these 18+ hour hand and body warmers. In cold weather, hands and feet are often the first to feel the effects of the chill. Simply unseal these hand warmers for radiant heat. Essential for every emergency kit. Also great for cold-weather activities, such as skiing and snowmobiling. An excellent addition to your first-aid kits.