I'm looking to buy a pair and I'm wondering about your sizing experiences and opinions. Does their waiste (on the board shorts) have any give to it? Or is it like SPRAWLS wheir it is very rigid and does not flex. How about fight shorts? What is there sizing like. My waiste is under 30, probably around 28. I definitally don't want them to small, I want to also wear them out side of training. But not too big so they fall off. Any info. would be awesome.