Caffeinated Tailwind meets all your calorie, hydration, and electrolyte needs just like you'd expect, plus it adds 35mg of caffeine per 100 calories. Caffeine is proven to significantly enhance high-intensity and endurance performance. Tailwind mixes with water to meet all your calorie, hydration, and electrolyte needs, without upsetting your stomach or making your taste buds revolt. Just toss it in a bottle or hydration pack, shake, and GO! Clean, light flavors taste better the longer you go. Dissolves on contact with water and cleans up with a quick rinse. Go all day with Tailwind.