I do not think any one knows because there is really no good answer. fifty years ago cushion life could be fifty years. Then mnfrs started saving

money and using alternative additives and fillers and we had supposedly high quality cushion going bad in a year or two.
As far as the icon cushion you are asking about, my only experience with it has been on connelly tables. Imo, the cushion appears to be of good quality and should last a reasonable life.Artemis cushion imo is some of the highest quality cushion made. Sorry we could not be of more help.
John