Bali Women's Comfort Revolution Front Close Shaping Underwire Cup, back: Nylon/spandex; center belt lining: cup linings: 100% polyester; cup pad: 100% polyurethane foam; inner center belt: 100% nylon Cup, back: Nylon/spandex; center belt lining: cup linings: 100% polyester Ultra-thin stretch foam cups fit your curves beautifully. Front closure for easy fastening. Wider band for back smoothing. Soft Comfort Band gently flexes to move with you.