I recently had to spend over 8 hours out in the sun in Hawaii for work. (That might sound like fun, but I am very fair skinned and I was very concerned about getting burned.) This sunscreen saved me. To be on the safe side, I used an ample amount and I reapplied it often, and it really did work. Also, it is not as greasy and sunscreen-smelling as many other brands I have tried. Highly recommended.