HotHands Hand Warmers Hands 40 Pair HotHands warmers are single use, air-activated heat packs that provide warmth and are ideal for keeping your hands warm when the temperature gets cold. Ultra-thin and ready to use (just shake to activate). HotHands provide up to 10 hours of heat for your hands. Features ready to use, odorless fast heat; disposable; TSA approved and 10 hours of heat.