Why doesn’t the SOOTHE Mineral Sunscreen SPF 30 contain SHIELDrf?

To best meet the needs of sensitive skin, SOOTHE Mineral Sunscreen uses a combination of zinc oxide and titanium dioxide to help protect the skin from the sun. Physical, inorganic sunscreens are inert on skin and have the added benefit of helping to keep skin surface cool and reduce the appearance of heat-induced redness.