Ultralight and breathable, the Amphipod PureRun Essential Hydration Vest (1.5L Reservoir) provides the perfect amount of fluid and storage for every training run. This hydration vest elevates your miles with a premium construction and incredible comfort -- delivering a custom fit and bounce-free run. Ideal for long training runs and trail adventures, the minimalist but mighty Amphiphod PureRun Essential Hydration Vest (1.5L Reservoir) brings everything you need without weighing you down! Cool, ultralight and fully breathable Includes premium 1.5L Soft-Tech™ Reservoir with high-flow bite-valve Comfortable and custom-fitting Cinch-Fit™ vest construction Bounce-free Lateral Stabilization System™ design Breeze-enhancing open footprint with 3D Honeycomb™ Mesh inner Versatile, easy-access front expandable storage compartments for fuel, phone, nutrition and essentials Optimized rear storage capacity, and easy-access secure zipper pocket Fully-adjustable custom fitting one-size-fits-most design