Each pack contains six chews and is designed with Clif’s unique Fastpak system, which makes accessing and tracking your intake straightforward and fuss-free. The format fits neatly in a jersey pocket, belt, or vest, allowing you to fuel on the move without slowing down. The carefully balanced blend of simple carbohydrates and electrolytes helps sustain energy, regulate hydration, and prevent muscle cramps during prolonged physical activity.

Flavour variety adds even more versatility to the Clif Bloks range. Black Cherry and Tropical Punch both contain 50mg of caffeine per serving to give you a mental edge when fatigue sets in, while Margarita is loaded with extra sodium to help replace what’s lost through sweat on hot or high-intensity days. These options let you personalise your fuelling strategy depending on your session goals and environmental conditions.

Clif Bloks are suitable for a wide range of endurance sports and are trusted by runners, cyclists, and triathletes alike. Whether you're chasing a PB or just getting through a long day on your feet, they offer a clean, quick, and tasty way to keep going strong.

Clif Bloks work by delivering fast-absorbing carbohydrates and key electrolytes that are rapidly utilised by the body during exercise. Each chew provides 33 calories, helping to sustain blood sugar levels and muscle energy. Meanwhile, added electrolytes such as sodium, potassium, and magnesium support fluid balance and muscle contraction, which are crucial for performance and reducing cramp risk.

The Fastpak format ensures you can open and consume Bloks with one hand, making them ideal during races or training. Depending on the flavour, they also provide targeted benefits, like caffeine for alertness or extra sodium for hot, sweaty sessions. This means you can tailor your intake to match your specific performance needs.