Laptop backpack daypack suitable for unisex colours blue grey style casual capacity 35 litres weight 095 kg height 43 cm width 31 cm depth 25 cm max laptop size 17 inch features key holder waterproof zips reflective elements pen holder organiser removable accessory bag chest strap water bottle pocket padded back internal pockets laptop pocket outside pockets front pocket straps ergonomic shoulder straps compression straps main compartment fea