There are such things

送交者: xh 于 2007-05-29, 11:10:53:

回答: 没那个东西，我逗着玩呢：）由 shine 于 2007-05-29, 10:49:32:

like iron-on mending tapes.

http://www.joann.com/joann/catalog_old.jsp?CATID=82300&PRODID=165402&rId=GOBASECI

Never used on socks though.