Sized to fit kids ages five and up, the Camelbak Skeeter Hydration Pack features a compact design and an internal 35-oz. OMEGA Reservoir. Camelbak recently refined their entire OMEGA Reservoirs with a HydroTanium polyurethane film that further enhances the integrity of one of the most burst-resistant hydration reservoirs in the industry. The Skeeter Hydration Pack doesn't have a clutter of pockets, but it does have plenty of reflective elements to increase rider visibility in low light conditions. A breathable wicking mesh backpanel helps pull perspiration away from your child's back for better comfort on long rides and hikes. Camelbak suggests that a liter of water should keep a kid hydrated for one to two hours, but this often depends on environmental conditions and how long the novelty of chewing on the self-sealing Big Bite Valve lasts (in field tests we found that a few kids under the age of five chewed through the Bite Valve until it wouldn't properly seal--you may want to pass this parental advice along to your eager riders, hikers and campers).