Ideal for suitcases or spare suitcases. Ours were chewed off by a puppy, we bought them as replacement covers. They work on joysticks with and without rubber. They lose their shape on one of our Xbox controllers, but they stay and you don't notice it while playing. They are interested in customizing their controller at a very low cost and it helps kids identify their favorite controllers. They are very easy to put on and take off. The price is a great product. Definitely not for small children, they are easy to remove.