⚠️Great Price! ⚠️ ⭐️This is a new, unused item, but the outer box has some scratches. ⭐️The product itself has never been touched. ❤️It can be used for cooling measures during fevers such as influenza in the coming season.⭐️⭐️⭐️ ⚠️Color is black. Please be aware. Thank you for viewing! ╰(*´︶`*)╯ ♡Only one available✨ ♡New, unused✨ ♡Free shipping✨ ♡Instant purchase OK✨ 【✂︎Product Description✂︎】 Packing size: 23.1 x 15 x 2.4 cm; 240g Color: Black ✅Latest PCM cooling technology for sustained cooling: As a cooling pad for backpacks during summer outings, commuting, going to school, and shopping, it reduces back sweat. Phase change material (PCM gel) adopted from NASA technology freezes naturally below 28°C, and when combined with a cool backpack, it achieves sustained cooling. It keeps you cool for 60-90 minutes in an environment of 25-35°C. 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. As a heatstroke prevention item, it is designed for safety for both adults and children. ✅From preventing back sweat during commuting to heatstroke prevention for elementary school students during their commute, cooling during outdoor activities (fishing/fireworks displays), and multi-use for car seats/strollers. When attached to a backpack, it functions as a cooling pad, and when removed, it quickly transforms into a cool cushion or cooling pillow. It shuts out the heat on your child's back during their commute and prevents heatstroke with natural cooling that poses no risk of frostbite. ✅Optimized for backpacks, with a 22x28cm size (compatible with all types of backpacks, from school bags to outdoor backpacks). It fits the back with a 3D shape for a cool, close fit. Ultra-lightweight design of 6mm thick and 190g (50% smaller than conventional products) for excellent storage. The back pad with ventilation promotes cool air circulation, preventing condensation and improving breathability. Adjustable clips for easy attachment in 10 seconds, even for children. ✅Safe and durable with high-quality materials: Uses German-made biodegradable PCM (TUV biodegradation certification). A 3-layer barrier structure completely prevents frost and condensation. Clears the JIS S 4057 standard's 3 times (30,000 times) pressure resistance test. Medical device level flexible TPU material realizes natural freezing below 28°C (zero risk of frostbite). Uncolored ink technology with less than 0.1% color fading after 1000 washes + antibacterial treatment thoroughly suppresses mold/odor. ✅Thorough guarantee of Japanese quality control: Integrated production at our own factory certified by ISO9001. k2-$$0578