A photo from the 1920’s of ladies promoting Durasil for ladder free stockings. (For non-Brits, ‘ladder free’ means ‘run-free’.)
There’s long been wishing for stockings and pantyhose which didn’t run. So far, there’s nothing to prevent such delicate fabric from running – and remaining comfortable, anyway. Here’s a long discussion at StockingsHQ — if you read it, read the whole thing for debunking!