Shirts?

Where do y’all purchase mens shirts that don’t require to be ironed? It seems like most of my husbands require it and I’m sick and tired of that. He does have a few that don’t but it seems like it’s just luck he normally gets what he likes without paying attention. Idk which fabric don’t require an iron? Or do I have to only get wrinkle free? I mention this issue he says he doesn’t care he can get whatever makes it easy on me just to let him know what fabric to look for or for me to show him the ones that don’t require so he can choose between those. Sorry if this isn’t the place to post!! Just need advice. TIA.