Laptop backpack daypack suitable for unisex colour black style casual height 45 cm width 31 cm depth 16 cm max laptop size 16 inch features organiser pen holder headphone access chest strap padded back internal pockets inside pocket mobile phone pocket mp3 player pocket outside pockets front pocket straps ergonomic shoulder straps padded shoulder strap main compartment feature fits a4 size bag feature suitable as cabin luggage iata norm materia