This multifunctional laptop backpack by RILIBEGAN is made out of nylon with polyester lining material. The material is wear-resistant, scratch-resistant and extremely durable. The internal space can fit laptops up to 15.6 inches and the inside is completely structured with several pockets and holders for your phone, wallet, tablet or any other items. There is a large pocket on the front which will fit most tablets and double side pockets for easy access without taking the backpack off. All of the compartments are closed with a sturdy zipper. On the right side of the bag there is a handy USB 3.0 port. The port can be used in combination with a power bank (not included) that can be connected on the inside of the bag. The strap is extremely comfortable with decompressing pillows to divide pressure over your shoulder. The back of this bag is completely ventilated with breathable material, this way you won't get sweaty under the bag. TypeBackpackColorGrayShapeBoxMain materialNylonLining materialPolyesterPatternSolidStyleBusinessDimensions44 * 30 * 13 cmCapacity20 liters