Hothands Toe Warmers are rectangular shaped single-use air-activated heat packs that provide up to 8 hours of continuous warmth for the toes.When to use Hothands Toe Warmers? Skiing Working in the yard Shopping Working Outside Hothands Toe Warmers Features: Up to 8 hours of heat With adhesive on one side so It stays where you stick it\xBB Ready to Use Air-Activated Safe, Natural Heat Ultra Thin Contains one pair per package How do Hothands warmers work? Hothands contain ingredients like iron, activated carbon and water. Once these ingredients come into contact with the oxygen in the air, the ingredients oxidize and produce heat. The combination of ingredients has been specially formulated to ensure a constant and comforting heat for a wide variety of uses. HotHands Toasti Toes 8 Hour Toe Warmers - 40 Pack Case