The Camelbak Mini Mule 1.5L Backpack maybe for the groms, but this pack has all the grownup features—1.5 liters of water, a bike tool organizer pocket, and zippered compartments for layers and essentials. We’ve also added reflective strips and a safety whistle to make kids easy to spot on the trail. FEATURES: The brand new Crux delivers 20% more water per sip, with an ergonomic handle for easier refilling, and an on/off lever that makes it easy to prevent leaks Breathable air mesh back panel for a lightweight, comfortable fit Reflective accents for visibility in low-light environments Stretch overflow storage compartment lets you easily stash a rain shell or extra layer Safety whistle built into sternum strap Dimensions 36 x 19 x 15cm Body: Recycled 200D Poly with C0 DWR Lining: P135D Solution Dyed with C0 DWR Suspension: Recycled Poly Air Mesh Storage Capacity 3.5L Reservoir Type 1.5L Crux Volume 5L Fit Range Torso: 30 - 40cm Pack Only Weight 390g