I purchased this product for a better quality seat while playing the cajon: not saying that the rubber ones are bad, they are great but I needed something more durable because I am using quite a lot this instrument and I needed something reliable and... that stays in place with a good grip. Everything I just said is, in a nutshell, this item: great, durable and it stays where you put it for the whole seat. And it is very comfortable too... Highly recommended!