The soft, moisture gel transmits a pleasant warmth to your neck and shoulders. The belt shape allows you to wrap it around your waist or knee. Comes with a thermal brushed cover that can be heated in the microwave while the gel bag is in the cover. The cover can be removed and washed. Can be used repeatedly and economical. Ingredients: Water, multi-cost alcohol, polymer absorbent resin, polyethylene; Cover: Polyester; How to Use: (1) Put the gel bag into the cover (2) Fold it in 2 with the cover and place it in the middle of the microwave (3) Check the high frequency output (wattage), protect the time and heat it 500 W - 600 W. Front 1 minute/back 700 watt - 800 seconds. / 40 seconds on the back. 900 W - 1000 W... Surface 30 seconds / Back 30 seconds (4) Place it on where you want to heat up. If you want to cool it up, keep it cool for more than 2 hours. [Caution] Please check the microwave output (wattage), and protect the heating time before using. (If overheated, the gel bag will burst and the contents of the high temperature may scatter and burn) The heating in the automatic mode (auto or choice, etc.) will burst. Please do not use this product. When the main unit is warm, please set it up at a time of 10 seconds and heat it up. Please use 100 times. Depending on conditions and long-term use may reduce the strength of the gel bag. Depending on the microwave model, room temperature, gel bag temperature, etc., the heating may be overheated. Heats while watching and when the bag inflates or bursts, turn off the switch and open the door and allow it to cool out before taking it out. Does not use bursting gel bags. Do not eat the contents of the gel bag. Please read the precautions of use carefully before using.