[DETAIL] Brand new and high quality! Product name: Heads Ice Pack Product material: TPU Product size: Each one is different. Please refer to the size diagram for details Product Color: as the pics Features: 1. New Arrival-Summer: PCM Head Ice Pack, natural cooling agent pcm, no electricity required, rapid physical cooling, natural freezing below 28°C/82.4°F, quickly cool the head to prevent heat stroke, keep cool in the summer. 2. PCM and TPU Material: Reusable Cooling Hat Liner made of natural cooling agent PCM, naturally freezes below 28°C/82.4°F, keep cooling for a long time. the outer layer is made of 3. TPU material, no condensation, no water droplets, and will not wet your hair. 4. How To Use: Ice Pack for Head, before use, you need to place the PCM Cold Pack in an environment below 28°C/82.4°F and freeze it to a solid state. you can put it in a refrigerator, air conditioner, or cold water. then put it in the hat. 5. Suitable for Indoor and Outdoor Use: PCM Cold Pack, ideal for outdoor work and sports, suitable for helmets, bucket hats, cycling hats, baseball hats, sun hats. whether you are hiking, cycling, or working in the farm, ice hat can instantly cool your head. Package List: 1* Hat Cooling Ice Pads [ATTRIBUTES] - Gender: Unisex - Hign-concerned Chemical: None - Origin: Mainland China - Gender: Unisex - Hign-concerned Chemical: None - Origin: Mainland China - Material: PU - CN: Zhejiang