Jurassic Park Logo Backpack Waterproof Book Storage Bag Black Size: 29 x 45 x 13 cm/11.42 x 17.72 x 5.12 inch. Material: Oxford. Inner material: nylon. With mesh bag on both side, can organize the cup and other small things. Adjustable shoulder straps,good for outdoor activities, school or travel. High quality hardware accessories and zipper, strong and durable