Oakley 29L Gearbox Overdrive Backpack ul)100% polyamide. 100% polyester lining. Water repellent. Fits up to a 17'' laptop. Front access stash pocket with organization panel. Top-loading main compartment. Deep side pockets including mesh pocket overlay. Large front external zipper pocket. Sternum and compression straps. Padded shoulder straps and back panel with mesh inserts.