The Head Shock Plex System 5 Styling Hair Serum is an innovative hair product that works to repair and protect damaged hair. It contains five key ingredients a plex system to lock in moisture, a strengthening compound to reduce split ends, a shine booster to add vibrant luster, a UV protectant to keep locks healthy, and an added conditioner for smoothness. The 90ml size is perfect for those who want to give their hair the care and protection it deserves.