This break-through product was developed to help meet the needs of those with sensitive skin and those who are concerned about skin cancer-causing UVA rays. The SPF 30 was achieved by using Z-Cote® Transparent Zinc Oxide plus existing, proven sunscreens. Experts consider Zinc Oxide to be the most effective sunscreen against cancer-causing UVA rays. For centuries, it has been used to protect and soothe the skin. Classified by the FDA as a "Skin Protectant," it prevents chapping, cracking, and windburn.