When I have to wear more formal clothes, going out, church, etc... , I wear my Bohn Adventure armour underneath. I've been using them for long time and find them comfortable, and offer protection.
https://www.bohnarmor.com/
https://www.bohnarmor.com/catalog/bo...ard-system.php
Link to original page on YouTube.
Link to original page on YouTube.
While it doesn't offer protection of abrasions, it's intended more for impacts, underneath a, pair of Kevlar jeans, pants, etc...