Laptop backpack daypack suitable for unisex colour black capacity 305 litres weight 15 kg height 475 cm width 415 cm depth 295 cm max laptop size 173 inch size of laptop pocket 42 x 28 x 4 5 cm features trolley attachment chest strap raincover water bottle pocket pen holder headphone access key holder internal pockets laptop pocket tablet compartment mp3 player pocket mobile phone pocket inside pocket glasses pocket outside pockets front poc