The vanishing fabric ink pens used in the garment industry is the Chaco brand. I haven't seen that brand sold in stores anywhere. About a year ago I called a fabric design studio in NYC (found online) and asked what brand marking pens the designers used. The guy who answered the phone was very nice and we chatted about fabric. I think he liked my Arkansas accent. LOL He sent me a box of the ink markers. I shared them with guild members and we all liked them.