Eclipse SPF 50+ is an all-physical sunscreen, containing the sunscreen actives zinc oxide and titanium dioxide. Extreme Protect SPF30 contains these sunscreen actives and octinoxate. All iS Clinical sunscreen actives are micro-encapsulated so that smaller amounts are required to give the SPF protection indicated on the package. Both Eclipse SPF50+ and Extreme Protect SPF30 contain antioxidants and have a sheer, transparent finish that is cosmetically elegant and may be used alone or under makeup. Eclipse SPF50+ is also available in tinted shades. Extreme Protect SPF30 contains extra humectants (moisturizers), additional antioxidants, and Extremozymes for even more DNA protection.