I've the same concern when I bought sofina for my daughter who is going to have tennis lesson every morning from 9:00 am - 11:00 am. I also use Sofina UV product as a base. The sofina counter sales quoted that when kids after 6 months can use adult's product. Of course, she said that my daughter is almost 8 years old can use UV cut product. Anyway, I bought it for my daughter and the SPF 50 PA + in blue package looks quite OK.