PRO THICK Technology is a complex of thickening polymers that form bonds between strands for space. The space created gives a thicker appearance on the hair & makes achieving your desired style easier. Nioxin Pro-Thick Bodifying Foam provides hold & creates a fuller, thicker end result*. This styling foam leaves hair with manageable body. *vs. untreated How to use: Apply to towel-dried hair & comb through. Blow dry for volume & style as usual.