This is the Hiyai Cold Back Backpack Cover. It can be used as a cooling item, perfect for preventing heatstroke and for outdoor activities during the hot season. Simply cover your backpack to reduce heat on your back, making it comfortable to carry. It's lightweight and easy to fold, making it suitable for a wide range of situations, including commuting, going to school, hiking, and outdoor activities. 【Product Information】 ・Product Name: Cold Back Backpack Cover ・Brand: Hiyai ・Purpose: Heatstroke prevention, cooling item ・Condition: New, unused