Nioxin Root Lifting Spray is a volumizing texture spray for thinning hair. This lightweight leave-in spray adds structure, shine and texture, leaving hair feeling fuller and lasting all day. Nioxin Root Lifting Spray contains ProThick Technology, a professional complex of thickening polymers that lengthen and form bonds between the hair fibers, helping to increase the diameter of the hair while protecting its density. New look, same fantastic formula. Nioxin Root Lifting Spray is the new title of the former Nioxin Thickening Spray.