BOARD backpack is made of 600D polyester. It has one main compartment with two zippers.Inside there is an additional non-zipped compartment and a mesh pocket with a zipper for a sandwich or snack. Backpacks great features are the bright coloured velcro straps, which will successfully hold even a skateboard.The backpack is very comfortable to carry, it has a sponge and soft mesh reinforced back and a waterproof bottom with a PVC coating.