Cycling backpack childrens backpack suitable for childrens style sporty capacity 12 litres weight 039 kg height 37 cm width 24 cm depth 19 cm features key holder address label reflective elements chest strap water bottle pocket padded back outside pockets front pocket mesh side pockets additional fastenings safety light loop straps ergonomic shoulder straps bag feature suitable as cabin luggage iata norm material synthetic fiber fabric specific