The 'science' is political science.
Get on a plane, wear your mask. Unless you are eating or drinking then its safe to take it off while sitting next to 2 other people eating as well.
If you are in a crowd wear your mask. Unless it's a liberal crowd then 'science' says its ok.
And science says its OK to wear the same cloth mask every day for weeks. When you take it off with your hands and set it on the table at the restaurant it automatically cleans itself and doesn't spread any germs to the table or your hand.
So yeah keep wearing your mask, the (political) science says so.