Part of Nioxin's range of professional styling products, this strong hold spray helps to increase the diameter of the hair and protect its density for more volume. Nioxin 3D Spray with ProThick technology provides maximum hold for a look with more volume and density. This professional dermatologist-tested product helps protect fragile hair without compromising style. How to use: apply to dry hair. Comb hair as needed and spray finished style for lasting hold and control.