CHOOSE YOUR TRUE BRA CUP SIZE (WITHOUT PADDING) FOR BEST FIT. Nude silicone gel bra is the best bra for backless dresses. Wear this invisible undergarment as your bra for plunging necklines. Adhesive silicone bra snaps together in front to wear as a strapless push up bra! DETAILS: Please choose your true bra cup size (without any padding) for the correct fit. Self-adhesive, washable. reusable. Clean with soap and water and let air dry to regenerate adhesive.