Dimensions 53 x 42 x 17 cm. Volume 31 Lt. Weight 0,830 Kg Helmet backpack Expandable volume with zip to increase the dimension Main zipper to easy log into the total volume of backpack Padded back panel Ergonomics and adjustables padded shoulders straps Inner Padded pocket for tablet or labtop till 14” dimensions 23X34 cm Inner Phone pocket log in through back panel with opening 18 cm zipper lenght