I've had them on a few hats. I would rely on one as an only defence, but it does give one a bit of reaction time, and, as others have said, it looks a lot less silly than running down the road after a precious hat - especially if it blows into the path of traffic.... I like how the even look, as a feature - I wish Hats Direct did a pimped-out version of the Fed IV with matchnig contrast ribbon and brim binding, with a trolley.... givven those sorts of additional options, I'm not sure I'd ever need to buy a different model fedora again. I have to admit, I got a cracking chuckle at the idea of anyone in these parts worrying about being or looking "outdated". My Biltmore by Miller.com - my first furfelt hat, way back in 2007, has an elastic cord. I think it's Canadian? My Akubra Campdraft (Aussie, obvs), a Euro hat (I suspect a rebranded Tonak) and a couple of US vintage items all had regular string. IMO, the elastic does do a better job.