✅【Continuously Emitting Cold】The cooling backpack once debuted on "Hirunandesu" and has evolved as a cooling product, becoming the next-generation summer trend item. Unlike the short-lived cooling effect of cooling sprays, the cooling backpack continuously emits cold, preventing you from feeling stuffy even in summer! ✅【Naturally Freezes Below 28°C】This lightweight cooling item is easy to use for extended periods without fatigue! It uses highly waterproof materials, so the surface remains dry even if it absorbs moisture. It doesn't condense, so your clothes and neck won't get wet. ✅【Reusable】Cooling goods: A back cooling sheet for backpacks that keeps your back cool. Measures against stuffiness and heat in backpacks. Simply attach it to your backpack to make your back comfortable. When the contents become liquid, it naturally freezes below 28 degrees Celsius in a refrigerator, freezer, or ice water, and can be used repeatedly. ✅【Easy to Attach】Cooling back pad for school bags: Just attach it with the four fasteners. Easy installation: Use the rubber string with an adjuster and adjust it to fit the width of the shoulder straps. It can be used on various bags such as backpacks, school bags, and tote bags. Recommended for commuting, going to school, shopping, etc. Can be used by men, women, and children. ✅【Product Features】Backpack cooling pad size: Length 25 cm, Width 22 cm; Product weight: 200g; Material: [Outer] TPU (Thermoplastic Polyurethane), [Inner] PCM (Octadecane) Keeps your back cool and comfortable, perfect for backpacks and strollers in the hot season. yu215 2401