Formula 100 conforms to european recommendationsformula conforms 100 to european recommendations for protection against the harmful effects of uva and uvb rayssensitive advanced reinforced protection against long uva rays suitable for fair sensitive sun intolerant skinwhat are long uva rayslong uvas represent the majority of uv rays that reach the earth they penetrate deep into the skin and can cause long term damage which is not immediately visible they are particularly harsh on fair