Grabber Hand Warmers are rectangular, single-use, air-activated heat packs that provide up to 10 hours of continuous warmth for the hands. Safe, natural heat is environmentally friendly and odorless. Put hand warmers in gloves or pockets of coat or pants. Hand warmers are standard equipment for skiers, snowboarders, hunters, campers, hikers, birdwatchers, or anyone who enjoys outdoor activities.