Well the wind can do things but this stuff is pretty good if you find a spot away from folks and point into the wind. Dry, sheer, and great protection. Im fair slinned and I can burn pretty good and since using this stuff i can stay in the sun all day without an umbrella. Im not a dermatologist of course that is bad but this stuff is good and better than anything. And i dont have to use 70, 35 works great if iut of 70.