This is a new, unopened "Wise Port PCM ICY SHERBET HAT (Snow White) Cooling Hat Pad, Ice Pack for Hats." ○ Color: Snow White ○ Main body size (approx.): 18cm (height) x 18cm (width) ○ Material: [Outer layer] Thermoplastic polyurethane [Contents] Phase Change Material (PCM) No condensation, so it won't get wet! A new cooling item using the new PCM material! The Sherbet Hat naturally freezes below 24°C. Simply chill it in the refrigerator or cold water and place it in your hat. It absorbs heat from your head and protects you from the heat! It can be frozen not only with ice, cold water, refrigerators, or freezers, but also naturally in environments below 24°C, indoors or outdoors. It's convenient for use outdoors as it can be re-cooled with cold water each time it melts! *Even if it doesn't feel cold, it will absorb heat if it's solidified. Hats are essential for sun protection, but this is also recommended for children who dislike the stuffiness! Great for commuting, going to school, playing outdoors, walks, and summer leisure activities! [PCM] used in the ICY sherbet hat is a new material developed for spacesuits to protect against extreme temperature changes. It does not condense, does not get wet, and can maintain a set temperature (24°C). PCM maintains a constant temperature by changing from solid to liquid and liquid to solid in response to changes in surrounding temperature and body temperature.