Clif Bloks Margarita Citrus with Caffeine are Clif's most distinctive energy chew flavour — a tart, citrus-salt combination with 50mg of caffeine per three-block serving. The refreshing flavour cuts through mid-ride palate fatigue, and the citrus-salt formula is particularly appealing on hot summer rides when sodium replacement matters. 133 units in stock at Kaptein — stock up for the season.