Viper Boost caffeine energy bars are an advanced sports snack that contains a blend of nutrients to help to enhance mental focus & alertness during exercise. The first & only endurance fuel bar on the market with stimulating caffeine, it also provides carbohydrate to fuel your training session & re-energise your power output. Formulated using the latest sports science research, Viper Boost bars are a delicious, dark chocolate & apricot cereal snack option & being soft & moist in texture; the ideal option during a long ride or run. Whether you eat one immediately before exercise or during training & events, smart sports nutrition is key to you achieving a new personal best!