Keep warm with Hot Hands Hand & Body Warmers. These body & hand warmers keep you from shivering for up to 18 hours with warm, natural heat. Just open each pack, and the warmer is activated by contact with the air and quickly generates warmth. Hothands Body & Hand Super Warmers are perfect for those cold mornings when you"re out hunting, fishing or camping. You can even use them when you"re working outdoors in cold weather. Each box gives you 40 packs that are easy to take on the go.