, it proved easier to just tension the leather tightening strap as much as possible and allow for a slight floppiness. size just right??! This is easily the worse purchase I have made through Amazon. Two, they do make some air noise. Returned and purchased these. This makes them very easy to get on and off, and theyre extremely comfortable. It was fairly easy to assemble and break down for her. Rolls easily from room to room to transport laundered clothing. Order a size up. I have 3 mechanical keyboards the AnnePro 2, the Ducky One 2 mini, and the Keychron K2.