Named shirring. Nonetheless, the glance it generates is very similar to smocking, and that is an embroidery approach that’s existed a protracted long time. But probably don’t google “exactly what is smocking” cuz seemingly In addition it refers to something which has almost nothing to carry out with sewing… Anyway, https://gunneravphy.answerblogs.com/31921802/an-unbiased-view-of-rubber-covered-yarn