This pack has grownup features that fits younger explorers: room for 1.5 liters of water, a bike tool organizer pocket, and zippered essentials pockets. 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. COLLECTION: Bike. ACTIVITY: Cycling. USER: Youth. HYDRATION CAPACITY: 1.5L/50 fl oz. HYDRATION TYPE: CRUX Reservoir with Standard Exit Port. BPA/BPS/BPF FREE: Yes. QUICK LINK DISCONNECT: No. GEAR CAPACITY: 1.5L/90 cu in. PACK WEIGHT: 210g/7 oz. DIMENSIONS: 35.5 x 19 x 19.5 cm / 14 x 7.5 x 7.7 in.