The cover perfect solution if the exercise bike at your gym or spinning class isn't to your liking. The cover slips on easily, with three methods of securing over a regular bicycle saddle. First is a simple drawstring that you can tighten up in a second. This should be all you need if you're putting the cover on a stationary bike at your gym. Second are two tie-cords you can use if you want more security. And finally, the underside of the cover has a grippy, non-slip texture to keep it in place.