3COINS Three Coins Summer Cooling Pad for Backpacks Size: <Pouch> Approximately 31.5cm (H) x 22cm (W) <Cooling Gel Pack> Approximately 20cm (H) x 18cm (W) ● This cooling pad for backpacks keeps your back cool with a cooling gel pack. ● Perfect for summer outings and commuting to school or work to combat the heat. ● Can be frozen and reused. 《How to Use》 ● Freeze flat in the freezer for at least 3 hours before use. ※ This product uses a cooling gel pack that does not easily harden in the freezer. Please check the website for more details. I purchased this, but I am selling it because I bought other items. Since it is new and unopened, please refrain from purchasing if you are concerned about initial scratches or scratches during shipping. It will be folded for shipping.