Roll top main compartment. Side access to main compartment. Expandable wet/dry pocket. Fleece lined padded iPad sleeve. U-lock pocket. Organizer pocket. Water bottle pocket. Adjustable sternum strap. Reflective details. Specs 2174 cu. in. [ 36L ] . 20 x 16 x 6" [ 51 x 41 x 15cm ]. Materials 600D Polyester, 1200D Polyester with PU coating ( Black ).