One pack to do it all that keeps it clean on the outside and organized on the inside. 305D polyester Cordura oxford with PU backing. Cush ergonomic shoulder straps with adjustable sternum strap for comfort. Ventilation air mesh back panel. External attachment loops. Laptop sleeve: 14.5in x 10in / 37cm x 26.5cm. Tablet sleeve: 10in x 9in / 25.5cm x 22cm. External zippered accessory pocket. Fleece lined goggles and accessory pocket. Internal zippered mesh pocket with key clip. Two side zip water bottle pockets. Bluesign approved materials use only safe chemicals and reduce impact on both humans and the planet during manufacturing. Dimensions: 19in x 11in x 6in / 48cm x 28cm x 15cm . Weight: 1.3 lbs. Volume: 20L.