A spacer that attaches to a backpack, using a large cooling plate on the back to cool and a fan to prevent stuffiness. Recommended for those who are concerned about sweating with a backpack on their back! The [Cool and Non-Sticky "Backpack Spacer"] creates space between the backpack and your back. A large cooling plate sticks to your back to cool it, while a fan expels the heat. The cooling plate can cool up to -19°C from the ambient temperature! Simply attach it to your existing backpack for a refreshing and comfortable experience. Say goodbye to a sweaty, sticky back! No missing parts, confirmed. Purchased in 2024 and used once. There are thin scratches on the Peltier element.