Instant purchase welcome ✨ We aim to ship the same day ✨ We recommend following our account for information on great time sales! ↓ ✨ We have a lot of children's clothes for sale ✨ Bulk purchases welcome (⁠^⁠^⁠) #☆SMILE☆Same day shipping☆Negotiable on price 【 Product Name 】 - Brand: FRESH SWITCH - Type: Cooling sheet, naturally freezing - How to use: Use in a hat - Target: For children to adults PCM <Special cooling material> PCM is a new material developed for NASA, which has the property of maintaining a constant temperature by absorbing and emitting heat. How to use ① It can cool automatically if the temperature is below 28°C. Rapid cooling is also possible using a refrigerator, freezer, ice water, or cold water. ② Cooling time and duration Cooling time in ice water or cold water....about 30 minutes Cooling time in the freezer............about 20 minutes Can be used by children and adults Duration...about 1 hour *1. Our measurement (time to keep below 28°C) May vary depending on body temperature and environment. About 30 minutes in ice water or cold water *Lukewarm water will slow down the cooling reaction, so please expose it to water below 28°C. 【 Condition 】 Brand new, unused 【Inventory 2】 ◎ Bulk purchase welcome ◎ If you want to negotiate a price reduction, please be sure to reply to the comment ◎ For anonymous shipping, we will charge an additional 100 yen! 【 ⚠️ Important matters ⚠️ 】 We try to follow the guidelines of Mercari's official standards for product condition. Please be sure to look through all the photos posted! ☑️ Due to rising shipping costs, we will choose the cheapest shipping method. We will fold the item for packaging. We may change to Yu-Yu Mercari shipping depending on packaging and shipping circumstances. We will not charge any additional fees for changes made at the seller's convenience. *If you have a preferred method of packaging or shipping, Please be sure to check with us in the comments before purchasing! ✅️ No pets, no smokers. Please rest assured. ✅️ If you want to know the detailed dimensions, please comment. ⚠️ When you purchase, we will assume that you have agreed to the above contents! If you have any questions, please check before purchasing!