... Iron powder, water, salt, activated charcoal. Uses: Hand Warmer heating pads are standard equipment for skiers, snowboarders, hunters, campers, ... packing or customized packing. Hand warmer packs Hander Warmer heating pad:provide warmly heat for 8 -12hours for your palm. ... a few minutes to start the process. Hand Warmer heating pads are standard equipment for skiers, snowboarders, hunters, campers ...