Skin analyzer tell you which sun-block products good for seaside use

Seaside always the best vocation option during hot summber
Girls, are you ready to spend your holiday?
There are many sun-block cream can be optioned, which one will the best?
Most cream disappear after washing, Oily skin care products easy to stay on the skin
30 minutes in advance use the sun-block skin oily before going to the sea. skin absore it.
We use skin analyzer detect the skin after using cream, after finish the swimming then analysis again.
Those kind of sun-block oily still on the skin surface.
After come back home, using the tomato daub body, you will back up soon