First Endurance Hydration Mix Package type:30 Serving Superior Comfort: The micro fiber

Superior Comfort: The micro fiber covered footbed is cushioned with extra foam

Featuring elastic heel straps that secure their feet

a slip-resistant sole stays light as a cloud thanks to airy EVA

Materials: Synthetic strap

streamlined silhouette with a commitment to responsible materials

First Endurance Hydration Mix Package type:30 Serving Superior Comfort: The micro fiberPREMIUM 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