... Components: Iron powder, water, salt, activated charcoal. Uses: Hand Warmer heating pads are standard equipment for skiers, snowboarders, hunters, campers ... packing,paper box packing or customized packing. Hand warmer packs Hander Warmer heating pad:provide warmly heat for 8 -12hours ... in the palm of your hand! Air-activated Hand Warmer keep hands and fingers toasty for 8-12 hours.(Average temperature ...