Named shirring. Having said that, the appear it produces is similar to smocking, which happens to be an embroidery method that’s been around a protracted while. But maybe don’t google “what exactly is smocking” cuz evidently In addition it refers to something that has absolutely nothing to accomplish with sewing… https://andresfjoqt.idblogz.com/32231975/the-best-side-of-rubber-covered-yarn