The one I use ,has a fold over, a bit like a wallet. It also has a lining which is supposed to help. I also use a steering lock as backup. I’ve had no problems, but it pays to be vigilant . An owner at the end of my short road with a high end BMW had an attempted break in a couple of weeks ago. 3 guys were in the process of raising a ladder to his bedroom window at 1.30 am ! Obviously to get to them before they raised the alarm ! Neighbours wife saw this, shouted for partner to call cops, which the bad guys heard, so smashed their windows for good measure! Hate to think what might have happened,had they got in the first house !