The Camelbak Spark 10 LR Hydration Pack is women's specific pack built for lightweight endurance mountain biking. Carrying 2 liters of hydration, the Antidote Reservoir is stashed in the lumbar in the Spark for greater control while biking. Made to be ultra light, the Spark hydration pack is still capable of holding 450 cubic inches of cargo space so you will have plenty of room for your helmet, multi-tool, a spare tire tube, snacks and your personal essentials. The ultra-light 3-D Mesh Independent Suspension Harness has a slider sternum strap and the back panel has a lightweight exoskeleton to offer significant airflow with minimal weight and bulk. An integrated media pocket in the Camelbak Spark endurance pack means you can bring your tunes on the trail and the stretch overflow storage will give you ample ways to bring along everything you need. There's even a helmet hook to keep your bike helmet attached to this Camelbak when its not on your head instead of just hanging off your handle bars. Stay light on the trail without leaving your gear behind with the Camelbak Spark 10 LR Hydration Pack.