Super Strength (also available in regular strength) works best, eliminating dry flaking and relieving itching while keeping the scalp and hair hydrated. Discover the benefits of combining packaging research with the latest system technology. The Parnevu system smoothes hair and keeps it straight longer by conditioning it throughout the relaxation process. A stronger application of conditioning agents at each application step helps restore and rebuild your hair, leaving it smoother, softer, shinier and fuller.