CamelBak's Women's RaceBak is a revolution in lightweight wearable hydration. This quick-drying, breathable baselayer hides an innovative 70-ounce reservoir that comfortably slips under your jersey for superior aerodynamics and ease of use. It's sleeveless for excellent mobility, has a full-length zipper and uses flat-lock stitching throughout for forget-about-it comfort. Your water stays cool thanks to the insulated back panel and tube cover, and the Hydropouch reservoir compartment stabilizes and supports the water weight on your back. Athletes rejoice - the next generation of hydration is here