Purple Simply Seat Cushion
This is a wonderful cushion.  The material always stays cushy never flat.  This is the 2nd Purple seat cushion I've purchased.  But I don't like the little dots on the bottom of the cover.  The dots are not grippy enough.  The whole thing tends to move too easily.  I am going try to add a few dots of silicone to see if that helps.  But other than that, I am very happy with the Purple products I've tried.
Rating: 4 stars