The definition of definition. Far more than simple "pump" products, the first layer in this advanced dual-layer tablet kick-starts your workout using breakthrough fast-dissolving technology to flood muscles with Volumizing Nitric Oxide (from L-Arginine) and stamina-boosting Beta-Alanine. The time-release second layer dissipates more slowly to fuel sustained and intense 1-2 hour workouts. Pre- and post-workout muscle pump. Increased peak power and strength. Caffeine free-perfect for supplement "stacking". Boosts blood flow during exercise. Increases aerobic capacity and delays fatigue.