Is this the new thing in bikinis for really bigger boobs or is it how to customize off the rack bikinis? Don't know, but from Allegra, to Beshine, to Mary, they are all getting the same thing, where the cups are free to slide laterally as needed for coverage. Standing and lying down, really big boobs tend to find their own place, which as anyone who remembers the Beshine pink bikini video, results in the top being slingshotted off, hence the need for adjustable cups. Wondering as the straps and material are often in contrasting colors.