Thank you for viewing! ☆(=^ェ^=)☆ ❤️ Price negotiation → Highly welcome ⭐️ First-come, first-served ⭐️ Initial defect guarantee ❣️ [New, Unused] Opened for product inspection and photography. Latest PCM Cooling Technology for Continuous Cooling: As a cooling pad for backpacks during summer outings, commutes, school, and shopping, it reduces back sweat. Phase change material (PCM gel) adopted from NASA technology naturally freezes below 28°C, and when combined with a cool backpack, it achieves continuous cooling. It keeps you cool for 60-90 minutes in an environment of 25-35°C (more energy-efficient than conventional cooling materials). Using the physical phase change principle like "ice that doesn't melt," it keeps your back cool and prevents body odor. Safe for use by adults and children. Designed for safety for both adults and children as a heatstroke prevention item. ❤️ I have many other wonderful products for sale too♡ ↓ Further discounts available for bulk purchases (=^×^=)↓ #Click here for a list of Muku's shop Management number: 5-280