Laptop backpack daypack suitable for unisex colour grey capacity 18 litres weight 145 kg height 56 cm width 27 cm depth 12 cm max laptop size 17 inch features raincover chest strap hip strap internal pockets padded laptop compartment tablet compartment outside pockets front pocket additional fastenings helmet holder straps ergonomic shoulder straps padded shoulder strap bag feature suitable as cabin luggage iata norm material synthetic fiber