Smart Cups bra inserts add a thin layer of modesty without adding volume. Insert into your bra to soften and diminish the look of the apex. They help to conceal under tops and casual and formal dresses. Flexible enough to fit under different types of bras, sport bras, shapewear pieces, and swimsuits. Can be worn as an additional layer between you and the bra for added softness against your skin. Made from soft, non-stick 1/8” thick foam. Hand wash, air dry.