Trolley backpack laptop backpack suitable for unisex colours blue black capacity 275 litres maximum volume 32 weight 28 kg height 515 cm width 365 cm depth 285 cm max laptop size 173 inch size of laptop pocket 42 x 28 x 4 5 cm features with feet padded back pen holder internal pockets laptop pocket tablet compartment document sleeve inside pocket credit card compartment mobile phone pocket outside pockets front pocket additional fastenings