Tailwind Nutrition is a Durango, Colorado brand popular with trail and ultra runners. Its Endurance Fuel is an all-in-one drink: calories, electrolytes and water in one bottle, so many runners skip gels. The electrolyte blend includes sodium, potassium, magnesium and calcium. It comes in single sachets, 50-serving bags and caffeinated flavors. Tailwind is the official fuel of the Hardrock 100.
This mix suits long runs, ultras and hot trail days where solid food gets hard to eat. For short runs it is too much, since each serving carries real calories. Big bags are the cheapest way to buy it, and the brand offers free shipping over $59. Repeat buyers can set up regular orders on the site. The taste is mild, but some runners get tired of it after many hours.
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