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 our 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. For kids 4-12 years old. FEATURES 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 KEY ATTRIBUTES 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 HydraulicsA(R) LT 1.5L reservoir with quick-zip access and sternum strap magnetic bite valve attachment. COMFORTABLE & STABLE CARRY - Lightweight airmesh-covered backpanel and harness create a comfortable carry and low profile for optimal stability. CARRY INFORMATION 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 SPECS VOLUME - 92 IN3 / 1.5 L DIMENSIONS - 11.81H X 7.87W X 3.94D IN. WEIGHT - 0.54 LBS. FABRIC - MAIN: 220D Recycled Polyester Packcloth ACCENT: Not Applicable BOTTOM: 220D Recycled Polyester Packcloth