Air-activated portable heat keeps hands and fingers warm for up to 10 hours. 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. 1 pair per pouch. Reusable: No Duration Time: Up to 10 Hrs.