This pack has grownup features—1.5 litres of water, a bike tool organizer pocket, and zippered compartments for layers and essentials— in a package that fits younger explorers. We’ve also added reflective strips and a safety whistle to make kids easy to spot on the trail. FEATURES Reflective accents for visibility in low-light environments Breathable air mesh back panel for a lightweight, comfortable fit Safety whistle included on sternum strap Secure zippered pocket for essentials Lightweight, ventilated mesh harness Bike tool organizer pocket keeps supplies safely stored and easily accessible SPECIFICATIONS Hydration capacity:1.5L Hydration Type: CRUX™ Reservoir with Standard Exit Port Bpa/Bps/Bpf Free: Yes Gear capacity:1.5L Weight: 210g Dimensions:35.5 x 19 x 19.5 cm Fits torso:30-40cm/12-16 in Back Panel: Padded Mesh