 protects about 96% of the UV rays. You get up to SPF of 50, you get to sun protection of about 98.6%. So the higher you go, the better it is. I would recommend a minimum SPF of 30. And in a strong Sunday like today, a minimum SPF of 50. And one of the key things to do is you got to reapply every two hours because these things revolve, our sweat