First Endurance Hydration Mix Package type:Single Serving feel-good fit and a spectrum

feel-good fit and a spectrum of fresh new colors

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Also with heel cupping and a high density rubber outsole

First Endurance Hydration Mix Package type:Single Serving feel-good fit and a spectrumPREMIUM ENERGY & HYDRATION MIX Our award winning EFS mix has been redesigned to help you train and race like never before. Backed by science and packed with 30g of carbohydrates per serving, the new EFS formula redefines fueling to help you go further, faster. Increases energy & improves performance Clinically effective dose of all 5 electrolytes to prevent cramping & dehydration Isotonic for rapid rehydration Zero Artificial Ingredients