Laptop backpack trolley backpack suitable for unisex colour black style business capacity 30 litres weight 305 kg height 54 cm width 40 cm depth 203 cm max laptop size 173 inch size of laptop pocket 42 x 28 x 4 cm features chest strap internal pockets laptop pocket tablet compartment outside pockets front pocket side pocket straps padded shoulder strap tuck away harness bag feature suitable as cabin luggage iata norm material synthetic fi