Nathan Running Hydration Vest Lightweight Running Vest for Men & Women Adjustable Backpack for Marathons Reflective Hydration Backpack Osfm Black

Bounce-Free Lightweight Design - Train harder with this lightweight running vest built for speed and comfort. Bounce-free design keeps your hydration steady mile after mile. No distractions, just performance., Hydration Bladder Compatible (Not Included) - This hydration backpack fits Nathan x HydraPak bladders from 1.5L to 2L. Slide in your reservoir (not included) and stay fueled for long-distance runs, races, or trail adventures., Adjustable Fit for All Body Types - Our adjustable running backpack uses a one-size-fits-most (OSFM) build for a secure fit on men and women. Layer over cold-weather gear or wear solo. Comfort all year round., Reflective Safety Details - This reflective running vest includes high-visibility trim to help you stay seen at dawn, dusk, or night. Run with confidence in low-light conditions., Built for Marathons & Trail Runs - Designed with quick-access pockets for gels, keys, phone, and more, this marathon hydration pack gives you hands-free access to essentials during training or race day.