Osprey Moki 1.5 Liter Youth Hydration Pack - The Moki bike pack makes it a breeze for little rippers to stay hydrated on the go with an included Hydraulics LT 1.5L reservoir. Designed with the same features as Osprey's adult packs, the Moki offers a low-profile design and ventilated airmesh harness which provide a comfortable carry in a riding position. A front shove-it pocket and external zippered pocket keep small items organized while a blinker light attachment loop helps keep kids seen. Biking-specific features: A low-profile design and airmesh harness provide a comfortable carry while in a riding position, a reservoir offers on-the-go hydration and a blinker light attachment loop promotes safe riding. Reservoir included: Osprey Hydraulics LT 1.5L reservoir with quick-zip access and sternum strap magnetic bite valve attachment. Comfortable and stable carry: Lightweight airmesh-covered backpanel and harness create a comfortable carry and low profile for optimal stability. Front shove-it pocket Small external zippered pocket Loop for blinky light attachment (light not included) Quick-zip access reservoir sleeve with included Hydraulics LT 1.5L reservoir Backpanel Ridged airmesh-covered foam with center air channel for excellent ventilation Harness: Lightweight, ridged airmesh harness provides ventilated comfort Adjustable sternum strap with rescue whistle