Excellent protection. I have very fair sensitive skin and just spent 8 days on a boat, usually only applying this once each morning on face and body, and have absolutely no sunburn, barely even a tan. I was super impressed with how long it protected my skin without diligent application throughout the rest of the day. I use high end cosmetics and skin care products, including other very expensive sunscreens, and found this sunscreen to be the most effective with no goopy, chalky, or greasy residue. I also appreciate that it has no strong fragrance or chemical odor, unlike most other sunscreens that I've tried. I've found a keeper.