1 Box = 7 - 0.31 oz (9 g) packets [2.17 oz (63 g)]; Drink Mix - Fitness - Lemon Lime. Natural flavor. 75% Fewer calories than leading beverages. No artificial sweeteners flavors or preservatives. Electrolytes to aid hydration (when you consume one packet during light physical activity). Make water your fitness ally with Crystal Light Pure Fitness. A fitness beverage made just for you with: no artificial sweeteners; no artificial flavors; no preservatives and colored with natural ingredients. Pure Fitness: It's lively and unexpected just like you! 15 Calories per serving. This product 15 calories; leading beverages 70 calories. Gluten free.