Say goodbye to one-use disposable heaters. Our Reusable Hand Warmer is a temporary warming tool for whenever you need an extra heat source. Whether at home or when you're out in the elements, this Reusable Hand Warmer delivers time and again! Features Provides up to two hours of heat Heats up to 130 Degrees F (54 Degrees C) in just 15 seconds Sodium acetate and water are activated by bending a metal disk inside the pouch When heat runs out, warmer can be rejuvenated with boiling water Environmentally friendly