Here's what other sites are saying:
Mixed drinks aren't just for post-race anymore. Finally, the ability to carry water and electrolyte drinks in one bladder. The unique Synergy bladder carries water and electrolyte/energy drink in separate chambers, and the Potency Dial allows you to choose pure water, electrolyte drink, or your preferred combination of the two throughout your adventure.
- Altrec Outdoors
The ingenious Nathan Synergy bladder features 2 chambers: 1 for water and 1 for electrolytes. A potency dial allows you to control the ratio: all water, all electrolyte or a combination of the 2. Water chamber has a filter-compatible screw cap; electrolyte chamber has a roll-top closure for easy cleaning. High-flow bite valve features an on/off switch for enhanced control.
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