A number of garments feature o-rings and therefore are recognized in such tags as o-ring_top, o-ring_bottom, o-ring_bikini and o-ring_swimsuit. But increasingly the loops don't easily fit the "o-ring" description due to being shaped like ovals, rectangles and hearts (witness post #1224993). So I wonder if it's time to change the "o-ring_*" tags to "loop_*"?