Why do you need braces? Well, they are multi-functional. Your trousers will stay exactly where you want them, no moving around or falling down and you can use them to adjust the height of your trousers. The braces have a cross back that will stop them from falling off your shoulders. They are fully adjustable with 4 metal clips that can easily be attached to your trousers. The straps are elastic, comfortable and 36mm wide.