The cold towel fabric structure is cooled by natural evaporation process, without chemical activation or refrigeration. It is soft, safe and friendly to your skin and environment. Self-cooling towels can lower body temperature during summer activities and work in hot environments; indoor or outdoor sports, popular tourist destinations, and help relieve fever, headaches or hot flashes Our cool towels can be used as cooling headbands, turbans or scarves, etc. Very suitable for golf, sports, gym, yoga, camping, running, hiking, cycling, etc. It is very portable and can be folded tightly into its own waterproof storage bag, which can be easily put into any sports, gym bag, etc. Suitable for all outdoor activities, such as cycling, golf, camping, hiking, fishing, hunting, hiking, jogging, etc. It can also be used for high-temperature operations, such as construction sites, driving, welding, painting and various industrial fields. It can even be used for first aid applications such as migraine, fever, bee stings, sprains, etc. how to use 1. Please soak in cold water. 2. Towels will absorb water to keep moisture. 3. Then, you can keep the low temperature for a long time. 4. If the towel gets cold, soak it in cold water again. Towel size: 90 x 30 cm packing list: 2 piece of cold towel (optional color and styles)