A physical (not chemical) barrier between you and the sun. Invisible Zinc protects against surface UVB and deeper penetrating UVA.
"I love Invisible Zinc’s natural protection layer and have been a fan for a long time."
"Nicole Kidman is famous for her flawless porcelain complexion. When we heard that she's a fan of cult Australian suncare line Invisible Zinc, we had to have it."
Harper's Bazaar USA