Laptop backpack daypack suitable for mens colour black style sporty capacity 28 litres weight 126 kg height 50 cm width 345 cm depth 22 cm max laptop size 15 inch size of laptop pocket 33 x 31 x 2 cm dimensions of tablet compartment 20 x 20 x 1 cm features padded back chest strap hip strap organiser pen holder reflective elements water bottle pocket emergency whistle hydration compatible key holder internal pockets inside zip compartment docu