I purchased this for my first grader, but they preferred another pattern, so I'm selling this one. The bottom is made of canvas fabric. The lining is quilted, making it less likely to lose its shape. Materials: Outer: 100% cotton Lining: Cotton quilting (polyester filling) Shoe case Approximately 22cm wide x 27cm high x 6cm deep * When three-dimensional, the bottom width is about 16cm x height is about 25cm It's a very nice item, so please use it!!!