The cover fits snugly on our air conditioner and the clips held it in place all winter, despite some days with pretty strong winds. It kept snow out of the interior of the A/C unit, while allowing the exterior to breathe. Everything I've read says you don't want to wrap your A/C unit, because that traps moisture inside and can lead to corrosion. This did the job exactly as advertised and seems like it's in good enough shape that it'll last for many years to come.