This bag is designed to be carried without making your back sweaty. I bought it at a direct sales store in Yurakucho during the Tokyo Olympics. The main selling point was that your back wouldn't get sticky in the hot summer. I only used it a few times, but it's true that my back didn't get sticky. I don't have a use for it anymore, so I'm offering it to anyone interested. The original price was about 15,000 yen, but I'm selling it at a lower price because there are some stains and fraying. Color: Black系 (Black-based) Stains/Tears: Yes