I love these cousins. I realize after buying them I obviously did not pay attention to the description because you do not have to deal with ties to the chair, the cousin has a rubber material on the bottom and it hold it in place. It will move if you move and twist in the chair to much. I think that is really neat, I have never seen anything like it or do not remember. It was a pleasant surprise my cousin who received it for me told me about the feature. I didn't notice it straight away. I especially like the color, it is a really unique color. I do not know how to describe the color, it looks like a really dark green but not solid, has texture to it. I highly recommend them. Thanks  :)