I prepared a simple shower filter for my friend with sensitive skin.
To filter rust particles, I used 10 micron, 5 micron and 1 micron filters in order.
To filter chlorine and other chemicals, I used Granular Activated Carbon (GAC) .
I placed all in a cheap shower filter that is selling on Aliexpress for 4-5 $ each.
Here are steps you can watch from video below.