Laptop backpack trolley backpack colour black weight 2 kg height 485 cm width 325 cm depth 18 cm max laptop size 17 inch size of laptop pocket 38 x 31 x 6 cm features organiser padded back internal pockets laptop pocket outside pockets front pocket straps tuck away harness bag features suitable as cabin luggage iata norm expandable volume material synthetic fiber inner material synthetic fibre material properties water repellent material car