The 3×5 is great as a hand warmer, in pockets, under beanies, and works great for spot treatment, arthritis, poor circulation and hot stone massage. The 3×5 lasts about an hour depending on how well you insulate it. You can also use the heat pack as a cold pack. Just plac..Price: $18.95 ![](https://cdn11.bigcommerce.com/r-7f3397d2ae83e8b48dd889540b7b618246f07f43/themes/Sammot/images/IcoRating0.gif)