"Keep your little explorer hydrated and ready to roll with the Osprey Moki 3 Hydration Backpack for Kids. Sized for ages 4-12, the kids' backpack includes a 1.5L Hydraulics reservoir with hose clip for easy access to water, and features a comfortable, stable fit that keeps them focused on the trail ahead. Spacious main compartment with mesh pockets offers organized storage for snacks, tools, and other essentials. Stretch mesh side panels on main compartment hold extra layers. A mesh-covered EVA-foam back panel and airmesh harness provide excellent ventilation and a low-profile fit for optimal stability while biking. Reflective logos, a blinky light attachment, and safety whistle on the adjustable sternum strap enhance visibility and safety. Internal name tag ensures quick identification. Built with an eco-friendly mindset, the Osprey Moki 3 Hydration kids' backpack uses bluesign-approved, 100% recycled fabrics with a durable water repellent (DWR) treatment. 100-denier high-tenacity nylon main fabric; 200-denier polyester bottom. 12.8""H x 8.7""W x 5.9""D. Volume: 3L (183 cu. in.). Weight: 0.54 lb.Manufacturer model #: 1000651. Ideal for young bikers from ages 4-12 1.5L Hydraulics reservoir with hose clip Comfortable, stable fit Main compartment with mesh pockets for organized storage Stretch mesh side panels for extra layers Mesh-covered EVA-foam back panel and airmesh harness Reflective logos, blinky light attachment, and safety whistle Internal name tag bluesign-approved, 100% recycled fabrics DWR treatment"