WHAT IT IS Keep colored thinning hair looking great with this duo from Bosley Professional. Includes BosDefense Nourishing Shampoo for Color-Treated Hair - 10.1 oz BosRenew Volumizing Dry Shampoo - 3.4 oz WHAT IT DOES BosDefense Nourishing Shampoo for Color-Treated Hair Bosley Pro BosDefense Nourishing Shampoo for Color-Treated Hair removes toxins such as D.H.T. from the hair and scalp skin a primary cause of hair thinning and hair loss. It helps to create a healthy environment for the hair and scalp while extending the life of color. BosRenew Volumizing Dry Shampoo Bosley Pro BosRenew Volumizing Dry Shampoo leaves hair soft with lots of volume and never flakes. It is formulated for fine to medium hair. Removes dirt excess oil and product build up. DHT Inhibitors help maintain healthy hair and scalp. Keeps hair color safe and lasting longer by lengthening time between washes and provides UV protection.