The Camelback Hydrobak Light is a perfect small fitness Hydration Pack for any activity. Made from lightweight and durable materials, this small pack can haul up to 50oz. of water with you on any high speed adventure. Air Support Back Panels with body mapping technology contours and fits any body shape with ease and allows for a full range of motion. A Reflective Logo on the back allows you to be visible at night. Lightweight and Durable Materials- Fatigue free and will last for years. Air Support Back Panel A contoured and comfortable fit. Secure Zippered Pocket-Take your belongings with you for the ride. Helmet Carry-Store your helmet as you take a break. Adjustable Sternum Strap-Customizable Fit.