The Osprey Jet 18 Blue is a lightweight kids' backpack with an adjustable waist, perfect for active days. Made from 400D recycled nylon, it offers abrasion resistance. It features top access, a front pocket and elastic compression pockets for organization. A mesh waist, Fit-on-the-Fly™ adjustment and a sternum strap whistle add security. Side pockets and the option to attach a Hydraulics™ reservoir add practicality.