Ladies/Womens Ultralite Backless Bra A/B/C/D/DD 30% Polyester, 30% Polyesterurethane foam, 40% Silicone Adhesive Hand wash with mild soap and water, air dry Provides maximum cleavage without binding bra straps or side extensions, creating total freedom and flexibility of movement Foam bra cups with adhesive on inside of cups, plus front closure for cleavage and lift Perfect for formal dresses, halter tops, strapless dresses, and backless dresses