Don't "Bundle Up"..."Bundle Off" with our disposable hand warmer. Our unique chemistry compound makes our disposable warmer last longer than others. When opened, air reacts to the ingredients inside the pouch to create a safe and long lasting heat so you can get on with your outdoor activities. Use it all day then dispose of it easily. With the THAW Disposable Insole Warmers, you don't have to let cold stand in your way.