Nioxin Pro Clinical's System Duo 4 is designed for dry, damaged, colored hair with progressive thinning. Clinically and dermatologically tested, this complete scalp & hair thickening system thickens and strengthens your hair against breakage while providing color protection. 8 out 10 users saw thicker, fuller hair in 30 days!
The System 4 Holiday Bag Includes:
*compared to purchasing shampoo and conditioner individually
