Laptop backpack daypack suitable for unisex colour black capacity 25 litres weight 12 kg height 445 cm width 335 cm depth 275 cm max laptop size 156 inch size of laptop pocket 37 x27 x 4 cm features trolley attachment chest strap raincover water bottle pocket pen holder internal pockets laptop pocket tablet compartment mp3 player pocket mobile phone pocket inside pocket glasses pocket outside pockets front pocket straps ergonomic shoulder st