Laptop backpack daypack suitable for unisex colour black style business capacity 15 litres weight 1 kg height 425 cm width 32 cm depth 18 cm max laptop size 141 inch features trolley attachment pen holder padded back internal pockets document sleeve credit card compartment mobile phone pocket valuables pocket tablet compartment padded laptop compartment outside pockets front pocket straps ergonomic shoulder straps padded shoulder strap main co