Get your younger kids back to school in style with the Grom. This thoughtfully designed kids backpack features a lower volume for lighter loads, plus safety features including reflective details and an easily accessed whistle on the sternum strap. External straps hold a skateboard or extra layers. 800 cubic inches (13 liters), 16 x 9.5 x 6in (41 x 24 x 15cm). Material: Polyester.