Our timeless bite valve helps liquids from escaping so you can keep yourself hydrated no matter how far you go.
Your 25oz. Soft Flask is perfectly compatible with ALL Nathan Hydration Vests & Packs. Speciically created for the Run Sling 6L and 8L.
This unique 25oz flask with long flexible hose features a bite valve which will instantly provide fluid and so you can keep your eyes (and focus) on the road ahead. Specifically created for the 6L and 8L Slings but can also be used in any of your favorite Nathan Hydration vests or packs.