The Hydration Back stores up to 50oz of water to keep you hydrated during your run for the ultrarunner in all of us. You may disperse fluids equally throughout your body by carrying fluids on your back. Additionally, the vest is comfy, thanks to its soft nylon construction.

Features

Running hydration pack.
250 cubic inches; 4.5L total capacity.
Diamond Ripstop 70D Nylon.
Reflective features to improve visibility in low light.