Painless and Safety : Nipple aspirator covering the nipples and using physical suction to suck out the flat, invaginated nipples, the nipple will stay erect, non-surgical, healthy and effective. .Use easy and flexible : Apply cream or glue to get more tightness and comfort, then cover the nipples, adjust the pressure to the most suitable for you, use the pump to slowly suck out the nipple. .High-Quality Materials : Nipple corrector is made of soft high-quality Silicone material, no burden to sensitive skin, comfortable to use. Easy to clean, wash with warm water then store it in a cool, dry place. Invisible size : The size is similar to nipple, it does not affect the appearance after wearing when you wearing a loose bra and other clothing. .Kindly Note : It takes a few weeks to achieve the best results. If you have any questions, please feel free to contact us. Anything can be solved more simply through communication.