Senscience CPR Cuticle Porosity Reconstructor Treatment Step No.1 33.8oz /1000ml Senscience CPR Cuticle Porosity Reconstructive Treatment For severely dry/damaged hair. C.P.R. is an intensive two-step in salon restorative treatment that repairs the cuticle porosity deficiencies by replenishing vital nutrients that have been depleted from hair. Fortifies, moisturizes and protects hair. Formulated with Keratin, Silk Amino Acids and Bio-Structurer to penetrate damaged cuticle layers to repair, smooth and seal for lasting protection that preserves moisture and shine.