New, Unused ※ Price gradually decreasing 【Important】Prioritizing Simple Transactions ▶ No need to comment before purchase, no need for transaction messages ▶ Business (shipping) only on weekdays (may ship on weekends/holidays) ▶ May open and fold the outer box for repackaging before shipping ▶ No receipt. Please inquire with the manufacturer for warranty ▶ Price reduction/question comments will be immediately blocked Those who cannot read the description are prone to trouble and cannot transact. If you are not satisfied with the photos and description, please purchase from someone else. 【2025 Summer New Design 2 Sizes Backpack/Workwear 2 Types 28℃ Natural Freezing】Cooling Pad for Backpack Workwear Back Cooling Pad Back Cooling Sensation Pad Heatstroke Prevention Summer Measures Natural Freezing Commuting to Work/School Car Seat For Children and Adults ● Adopting cutting-edge PCM cooling material inspired by NASA technology. It effectively reduces stuffiness and discomfort on the back in all summer scenes, such as commuting to work/school and outdoor events. It has a built-in PCM gel that freezes naturally below 28℃, keeping you cool for a long time. ● Cooling effect for up to approximately 180 minutes in an environment of 25-35℃. Combined with the cooling design of this product, it achieves superior energy saving and efficiency compared to conventional products. By utilizing physical phase change, it maintains a cooling sensation while also suppressing sweating and odors. ● A multi-functional cooling pad that can be used widely, from commuting to the outdoors. It is useful in various situations, such as measures against back sweat during commuting, heatstroke prevention for elementary school students, leisure scenes such as fishing and fireworks displays, and even use in car seats and strollers. ● If attached to a backpack, it becomes a cooling pad for the back, and if removed, it can be used as a cool cushion or cooling pillow. Especially when children are commuting to school, it effectively blocks the heat on the back and supports comfortable commuting with a natural cooling effect. You can use it safely without worrying about frostbite. ● Cooling + insulation W function. It is an economical design that can be used repeatedly, and is a reliable item perfect for summer heat measures. "Ergonomic 3D design for comfortable fit and highly breathable back cushion" It fits snugly on the back and keeps the coolness lasting. Available in two sizes, 22x30cm and 25x40cm, for comfortable use by children and adults. Six ventilation holes on the back circulate cool air and prevent stuffiness. It also suppresses the occurrence of condensation and maintains comfort.