The top of my jeans fold down (especially at the button) when i sit and eventually stays that way. Is this just part of teh natural wear of jeans. I haven't paid attention to see if it happens to ALL my jeans but just noticed it alot on these Loomstates (to the point where I can see the bulge through my t-shirt). My 'budding' bear gut aint helping matters but still, is there a way to prevent - or minimize - this while I work on getting washboard abs???