USN B4 Bomb Pre-Workout Cherry 300g - Increase Energy & Focus & Performance New. USN B4 Bomb Pre-Workout Cherry is a powerful supplement from the Hardcore Series, containing premium ingredients with optimal doses to push your limits, break plateau's and reach your goals. Take 30 minutes before a workout to give you the energy and support you need. It is scientifically formulated to increase your energy and focus during training. Experience explosive energy and RawPower™M with USN B4 Bomb Pre-Workout. Challenge yourself to unlock your ultimate performance! • Increase Energy & Focus • RawPower™M Technology • 200mg Natural Caffeine per Serving • 300g