Grabber Toe Warmers are single-use, air-activated heat packs that provide up to 8 hours of continuous warmth for the toes. Flat toe warmers have a thin design with a unique rounded toe and adhesive backing that sticks to the outside of your sock, or under or over your toes. Fits comfortably in shoes or boots. Safe, natural heat is environmentally friendly and odorless. Warmers are standard equipment for skiers, snowboarders, hunters, campers, hikers, birdwatchers, or anyone who enjoys outdoor activities. Packaged as a pair.