Description of Hydration Pack This pack has grownup features—1.5 liters 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 https://www.camelbak.com/shop/deals/kids-mini-m.u.l.e.-50-oz-hydration-pack/CB-1155S.html?dwvar_CB-1155S_color=Baton%20Rouge%20Flames