The Osprey Kids Moki Hydration Biking Backpack is perfect for packing a light layer, hydration, and snacks on a short hike or bike ride. Outfitted with a hydration pack, including a quick-zip reservoir sleeve and Hydraulics LT 1.5L reservoir. It has front panel access to the main compartment, a front shove-it pocket, and a small external zippered pocket. Theres even a blinker light attachment on the back for better low-light visibility. Made of durable nylon ripstop with a 1.5L capacity. 210-denier polyester triple diamond ripstop. Imported. Wt: 0.44 lbs. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Hydration Packs.