Nathan Soft Flask with ExoSpine Hydration Flask Size:OS moisture-wicking fabric moves sweat off

moisture-wicking fabric moves sweat off your skin fast

Layer it over a dress or tee to complete the (more socially acceptable

no bunching — during paddleboarding

Black) in waist sizes 28–38

Blue/Yellow

Nathan Soft Flask with ExoSpine Hydration Flask Size:OS moisture-wicking fabric moves sweat offFor runners who need clean, reliable hydration on long efforts or race day, the Soft Flask with ExoSpine is our pick for vest based hydration setups. ExoSpine ribbing keeps the flask from collapsing as it empties, so you get consistent flow without fighting the squeeze. Rolls up tight when dry, so you're not hauling dead weight late in a run. ExoSpine ribbing prevents mid squeeze collapse, giving you consistent, easy flow even when the flask is