Ideal for Sports and Activities, Instant Heat any place any time. Great for Outdoors, gardening, spectating sports, hiking, or just to keep your feet feeling warm on a cold day in or out of the house Great for Skiing, used by the GB Childrens Ski Team and Extreme World Challenges Upto 6 hours of heat, just open the packet give a quick shake and stick to your sock Keep your feet warm when fishing, sailing, playing golf, walking etc.