Most clothing is sized with formaldehyde and other chemicals. You have to wash your clothes before you wear them. I don't know what the deal is with the bras, if it's more formaldehyde than normal sizing or what.

My grandmother worked in a fabric store all of her adult life. She died in her early 60's of liver cancer and no history of it in her family. It was theorized by her doctors that it was environmental due to her working around fabric sizing all those years.

image FFV