Healthy Skin Protection SPF 35 3oz is a crucial part of the Obagi NuDerm System and contains 9% micronized Zinc Oxide to protect against harmful long UV rays linked to premature aging and cancer. Healthy Skin Protection SPF 35 is the last step in the Obagi NuDerm System and works especially well when used in conjunction with the entire Obagi NuDerm System. Please Visit our section on Obagi NuDerm System to view our products.