Only tried on once; no signs of wear or tear! This padded insert is specially designed for demi cup styles. Stick it inside wedding dresses, bras, bandeau bikinis, etc. for a natural-looking boost. Natural-looking boost designed for demi cup style clothing Boosts up to 2 cup sizes Prevents nipple slips in low cut tops Insert stays put and keeps clothing in place Interchangeable between outfits, no sewing required