Made of tough waterproof cloth, strong and durable. There is a large-capacity zipper pocket on the outside of the bag, which can hold ipad and general-sized e-books, and a small pocket inside, which can hold mobile phones and wallets. Size: Length is about 38cm, width is about 31.5cm, and the outer zipper pocket is about 20cm long and 31cm wide. The inner pocket is about 12.5cm long and 18.5cm wide. Main material: waterproof cloth, webbing. Cleaning and maintenance methods: wipe with a damp cloth.