Suggestions for boxers - serious

I know, how silly. But I am looking for suggestions on boxers, not the like floppy joe boxer style, but the supportive athletic type boxers that are not purely polyester.

I have been a huge fan of the patagonia boxers, but they are not making them anymore and they are falling apart, so need to find something new. I have tried a bunch, but none have the comfort/flex of the patagonia ones. If anyone knows very similar options, or even who the manufacturer was, really looking to solve this problem.