Wacoal Amazing Assets Contour Underwire Bra (853220). When you first touch this bra, you'll be amazed at how soft and pillowy the contour cup is! Even the Comfort Back straps have a velour-like touch. Made of nylon/spandex. Contour/t-shirt bra has supportive underwires that give a rounded shape. Seamless, flexible stretch foam cup doesn't crush, adds modest shape and has a microfiber overlay. Larger cup sizes hold their shape well. Top cup edge stretches for a more custom fit. Bandless front has no fabric below underwire, better for petites. Center panel - low for plunge necklines. Crossed and corded, with arched underside for high tummy comfort. Seamless, smoothing sides and back are 3-ply with stretch inner panel, and non-elastic, fused edges. Ultra-soft for comfort. Center-pull, fully adjustable elastic straps adjust in the back with coated metal hardware. Back coated metal hook-and-eye closure, see Fitter's Comments below for hook count. Leotard back. Please Note: Elastic straps for larger sizes will have restricted stretch for added support and less bounce.