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. Caffeine boost when you need that extra kick Complete calories, electrolytes, and hydration: Ditch the gels, chews, and pills, and go all day with just Tailwind. No gut bombs: Stomach problems? You’ll love Tailwind. Unless you enjoy being doubled over, retching. Tasty all day: Clean, light flavors taste better the longer you go. Hydration pack love: Dissolves on contact and cleans up with a quick rinse. No film, aftertaste or science experiments! All natural: Crystal clear with no dyes, preservatives or 4-syllable magical ingredients.