Nutrition Energy bars Clif-bar Blocks Energy Chews. Provide quick, chewable, energy to athletes while training and racing. SHOT Bloks come in 33 calorie cubes, making it easy to customize and track caloric and electrolyte intake during long outings and races. CLIF BLOKS are semi-solid, easy-to-chew sources of carbohydratesyour bodys preferred source of fuel during activity and electrolytes. CLIF BLOKS offer a variety of great-tasting flavors, some with caffeine, and one with 3X sodium, so you can customize your nutrient intake. 3 CLIF BLOKS also provide 100 calories, so its simple to keep track of calorie intake during long outings. In addition, CLIF BLOKS are made with organic brown rice syrup, a minimally refined source of carbohydrate with naturally occurring sodium, potassium and magnesium. We do not use high fructose corn syrup. CLIF BLOKS provide a convenient source of carbohydrates and electrolytes, and in some flavors added caffeine, for sustained energy during sports an