Use a small piece of felt go to a fabric supply, tape it on the tux under the lapel where the lavalier lays so when any brushing the felt will sound smooth. Works great for me!
I got turned on to https://www.ShoesForCrews.com by my cousin who’s been in the food service industry, being on his feet, this is where his wait stuff order their shoes. Non-Slip, great comfort, comes in dressy styles too.