UV Shield Microcapsules

 I know that the chemical filters are encapsulated in transparent microcapsules that cannot penetrate the skin. Did you choose this type of sunscreen because the other option physical filter is too heavy and not transparent?

You are right! 
A physical filter can never be transparent because it acts like reflectors (mirrors). 
It is these products that show up as a white layer where you have applied them in the past. They are obviously very effective, but no one likes the white colour of "titanium dioxide or zinc oxide". 
This is why the industry started making them more and more in nano sizes to become invisible. 
Problem is that these can be reabsorbed into the blood system which is not good. 
They are also not biodegradable, which is a problem for aquatic life.