You don't need to be good at math to recognize the advantage of the Burton Kettle Pack True Black Tripple Ripstop backpack. It has a convenient padded pocket for storing and safely carrying a laptop. Larger items fit in the large main compartment while your smartphone, pens and keys fit in the front accessory pocket. Point out that the ergonomic shoulder straps ensure perfect comfort. Features: Volume: 20 L. Dimensions : 42 x 29 x 15 cm Weight : 0,5 Kg External zipped pocket for accessories Padded laptop compartment (37 x 26,5 cm) Adjustable chest strap Ergonomic shoulder straps Lifetime warranty Backpack Burton ---Kettle Pack True Black Tripple Ripstop