Even SPF 50 doesn't do it....CAUTION!
 

Take note of this particular study on the effectiveness or not of sun screens:

Wearing sunscreen may NOT prevent skin cancer, study claims | Mail Online

As I am fair skinned and have had several bouts of skin cancer I have been a proponent of covering up VS sun screen. Mainly because I do not like to be greased up.

Big brimmed hats and long screen SPF light weight shirts are the uniform of the day for me....no room for vanity.

I have to agree - even with 50 SPF does NOT mean I can be out
in the sun!

Here'a s study that says chronic sun exposure isn't associated with melanoma, but intermittent exposure is....

Genetics of Skin Cancer (PDQ®) - National Cancer Institute