Welcome to 🌈Niko Niko Shop! Thank you for visiting! ❣️ Price negotiations welcome! ☀️ First come, first served! ☀️ Initial defect guarantee! Sustained cooling with the latest PCM cold sensation technology Reduces back sweat as a cooling pad for backpacks during summer outings, commutes, school, and shopping. The phase change material (PCM gel) adopted from NASA technology naturally freezes below 28°C, providing sustained cooling when combined with a cool backpack. Keeps you cool for 60-90 minutes in an environment of 25-35°C (more energy-efficient than conventional cooling materials). The physical phase change principle, like "ice that doesn't melt," keeps your back cool and prevents sweat odor. Versatile for all situations From preventing back sweat during commutes to preventing heatstroke during elementary school commutes, 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; remove it and it quickly transforms into a cool cushion or cooling pillow. It shuts out the heat on your child's back during their commute, preventing heatstroke with natural cooling that eliminates the risk of frostbite. A multi-use design that combines cooling and heat protection. Ergonomic x Lightweight Design Optimized 22 x 28 cm size for backpacks (compatible with all types of backpacks, from school bags to outdoor backpacks). 3D shape that fits the back for a cool, close fit. Ergonomic back fit shape + independent filling structure maintains a flat fit even after repeated use. Ultra-lightweight design of 6mm thick and 190g (50% smaller than conventional products) for excellent storage. Back pad with ventilation holes promotes cool air circulation, preventing condensation and improving breathability. Adjustable clips for easy installation in 10 seconds, even for children. High-quality materials for safe and lasting use Uses German-made biodegradable PCM (TÜV biodegradation certification). 3-layer barrier structure completely prevents frost and condensation. Passes the JIS S 4057 standard's 3x (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. *Opened once for photography and inspection, but it is a new, unused product. *We have many other wonderful products for sale too* ↓ Further discounts available for bulk purchases(*´︶`*)↓↓ #NikoNikoShop Management number: 7-406-R108$$680