Friends who have worn Aimu underwear can tell me why Aimu underwear is so expensive?

I have been wearing this underwear for three or four years, and I don’t think its underwear is expensive.

I used to wear underwear for two or three months before it became deformed and loose, and sometimes it made my chest feel uncomfortable.

After wearing this underwear, it didn’t lose its shape after being worn for a long time, and it was very durable.

And the comfort level is very good, and every piece of fabric is designed just right. I really can't wear other underwear again.