I have sensitive skin. I use La Roche Posay SPF 15 for anti aging daily SPF 15. Or I use Avene SPF 50 if I do sport outdoor. Still...., the products contain chemical small percents, but they're design for sensitive skin. I have no problem with them. If you go to natural, do try Darphin. Anyone knows about Darphin? That's also good. When I did hiking 1 hour my face wasn't getting red, like other sun products. My skin color stayed just like before. I've tried once Dermalogica...., (in Swiss that product is a bit expensive than in America).. really light. Perhaps you'll also like it.
I really love Eucerin Sensitive Skin Everyday Protection SPF 30. It's non-comedogenic, fragrance-free, and feels really light. Since it protects against UVA and UVB rays, it's also endorsed by the Skin Cancer Foundation.