Quote Originally Posted by Big D
It's her bra, nor panties I think.
It's described as "orthopedic underwear", so the general belief is that it's some kind of supportive bra. Large-chested women often suffer serious back pain; a woman as active and athletic as Tifa would face real difficulties and would need a lot of extra support.

I can see no reason why Tifa would have orthopedic panties.
Have you seen the international version? They have the picture of the underwear, and I think it was the bottom not the top.

EDIT: Here's the thread I was thinking of. ^^ http://forums.eyesonff.com/showthread.php?t=49198