Creating contour with flexible foam cups, Wacoal's convertible-back bra is designed with a built-in side sling for subtle boost. Elastic at back wing for flexible comfort Soft foam cups with embedded side sling Three hook-and-eye closure Imported Adjustable convertible straps with racerback hook at back Web ID: 4986982 Materials & Care Hand wash Body: nylon/spandex; front lining: nylon; cup lining: polyester