The bag's material is 60% cotton and 40% polyester for the outer side, and 100% polyester for the bottom and inner pockets. There's a hook on the outside of the side, allowing you to adjust the bag's thickness. Both the outside and inside are made of light blue fabric, making it a perfect color for this summer. There's a pocket with a divider on the front of the bag, and there's also a pocket inside the bag with a place to hold pens. It also has a good amount of depth, so I think it's convenient for going somewhere with a change of clothes. The size is 37cm wide at the top, 29.5cm wide at the bottom, 25.5cm high, and 13cm deep. It's unused and has no stains. Since it can't be sent compactly, I have changed the price.