I know a lot of people complain about tri tops rolling up on the bottom and crushing their ribs. I have the same problem. I used to just double up the bottom once to see if that fixed the problem, but it managed to bunch up pretty bad no matter what. So I took a pair of scissors to the bottom of my binder, cut off about 3-4 inches. I haven't bothered to sew it back up because I can't sew worth crap, but it's so much more comfortable now, and it still binds the same. It might be a good idea to sew up the bottom, but I don't think it's absolutely necessary. I'd suggest anyone trying this with one of their old binders just in case first, before doing this to any other newer binders you might have. I don't understand why the Underworks company felt the need to make the tri tops "NEW AND IMPROVED! 4 MORE INCHES IN LENGTH!", seems kind of pointless.

also it depends on how tall u are. im about 5'6'' and mine nevr rolls up, so just sayin

I think body shape influences the rolling up effect too.  My tri-top's have never rolled up, because my chest is wide and then tapers down at the ribs and I have a 27" waist.  If anything, around my ribs the binders are loose.  I could tuck it under, but it's not uncomfortable or noticeable through most shirts so I don't bother.  Back when I was larger around my mid-section though, I remember the double front's were hell with the rolling up.  I hacked those up with pinking shears because it was unbearable.

yeah same with me. i'm 5'6'' and it never rolls up on me, even though i have a bit of a gut =p
my ribs aren't really too small either so if there were gonna be crushed they would have, but it's actually a bit loose

The only time it really rolls up on me is when im at work and moving around a lot, but it doesnt bother me too bad.

Mine must be rolling up on me pretty bad then because I have a gut. XD; I'm working on losing the fat right now.

Mine always rolled up too Kohdy haha. I have a bit of a gut too though.

Yep, the gut makes all the difference. Mine started rolling up as I got fatter and fatter until eventually it didn't even fit.