Designed by athletes for athletes, CLIF BLOKS energy chews are a delicious source of quick carbs to provide fast fuel during long runs, races, games, and other high-intensity workouts. Our bite-sized energy chews come 33-calorie cubes in a variety of sodium and caffeine* levels to ...Designed by athletes for athletes, CLIF BLOKS energy chews are a delicious source of quick carbs to provide fast fuel during long runs, races, games, and other high-intensity workouts. Our bite-sized energy chews come 33-calorie cubes in a variety of sodium and caffeine* levels to help you customize your experience, all in an easy-to-carry and easy-to-open package.