These are mesh-type nipple covers, suitable for situations like marathons, sports, fashion, or when you don't want to wear underwear after childbirth. They are made of breathable mesh, making them comfortable to use even in summer. They are highly waterproof and resistant to water and sweat. They are easy to apply and cause minimal pain. Purchased online for around 1,000 yen. The film has been opened, but they have never been used. I am selling them because I have no opportunity to use them.