1st Endurance EFS Drink Mix
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- So much more than just a hydration mix. The updated EFS provides premium nutrition that supports physical and mental performance for discerning athletes
- Current formulation delivers industry-leading electrolyte content, improves mental toughness, sharpens your competitive edge, and also reinforces mental toughness, staving off panicked lapses in motivation when your body is screaming at you to stop
- 30 serving container