Sheer Physical UV Defense SPF 50 is an ultra-sheer, transparent sunscreen fluid that combines 100% mineral filters with artemia salina, a plankton extract to help boost skin's natural defenses to UV- and heat-induced stress, offers broad spectrum protection for all skin types, including sensitive. One of the best sunscreens for the face, it is formulated with Titanium Dioxide, a broad spectrum 100% mineral filter, and enhanced with artemia salina, a plankton extract to help boost skin's natural defenses to UV- and heat-induced stress. This silky sheer fluid spreads easily and dries quickly, leaving no residue.