Heat Factory Proheat Reusable Hand Warmer

TO USE Just flex the button to instantly heat THE HEAT SOLUTION pad. The liquid will change to soft thermo crystals that radiate heat at 130º F. TO RECHARGE - After each use, simply boil the pad to return the crystals to their liquid charged state. Now you can take your pad anywhere and with the push of the button it will provide heat again... and again...and again.