Ergonomic shoulder straps, an adjustable sternum strap, and hip fins give this biking backpack a solid, comfortable fit for junior bikers – no matter how fast they ride the pumps, berms, and jumps. And the features are impressive too: stowable protective gear attachments on the base, a helmet holder with attachment clips, a roomy main compartment for food and extra layers, a quick-access tool organizer compartment and two stretch mesh side pockets.