The Hotshotz Portable Face Mask Warmer is a special type of heat pack specifically made to ease the muscles in your face while also reducing tightness and nervous tension. This mask is outstanding for people who suffer from and need relief from migraines, sinus difficulty, sinus congestion, allergies, and headaches. Can be used for those who want to treat themselves for a relaxing period of time. The face mask is not only just for the face, it can be used on other parts of the body such as the back, sides, neck, and wrists. To use the HotShotz Portable Face Mask Warmer, squeeze the activator button until it clicks and the warmer will automatically heat up on its own and be ready to be used. To recharge after first and each use thereafter, wrap with a fabric cloth (dish cloth, for example), place and leave the heat pack in a pot of boiling water for 10 to 20 minutes, making sure all crystals have melted. Take it out of the pot and let the warmer cool down to room temperature and it’s ready to be used! Usability will generally last an hour. Time will change depending on how you use it and how well you insulate it.