Just take it out of the bag. Great for fishing or watching sports in cold weather. Heats your entire body from your hips, hips, feet, and body! It has good cushioning and is very comfortable to sit on. Soft to the touch and durable. Can be used for a wide range of purposes, such as knees, hips, back, legs, etc. (Temperature/hour) Maximum temperature: 144°F (66°C); Average temperature: 122°F (52°C); Duration: 8 hours; How to use: Remove from the outer bag and use for about 5 minutes. It starts to warm in minutes. When it is too hot, please wrap it with a handkerchief or towel to use. If you are fishing, please secure it with a string or put it in your pants to use. Will not blow away in the wind. (Materials) Iron powder, water, wood powder, activated carbon, salt. (Precautions): Low temperature burns are exposed to a heating element that is higher than your body temperature for a long time may cause burns on symptoms such as red spots, blisters. Please note that there may be cases of low heat burns without awareness symptoms. Please do not use it when sleeping as the temperature will increase. In addition, please be careful when children or those with disabilities or those with a weak skin texture. Please do not throw it away as it is dangerous. Please take it home after use, or discard it as a garbage can, etc. as a fireproof garbage can. Please note that the temperature will drop if it gets wet. Not edible. Store in a cool place away from direct sunlight. Please keep out of reach of children.