Just picked up one of these https://www.wildhareshootinggear.com/store/p/1289-Wild-Hare-Short-Sleeve-Shooting-Shirt.aspx
and I liked it so much I got a second one. Hard to find very much for the lefties and this is an excellent design. Also the recoil eater pad that fits the shirt is the best one I have tried, better than past, sorbathane and others I have used. The checked ones are on sale now.

"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli