I started a thread awhile back about my rear seat bottom looking like this after 7 or so years. Now my rear seat backs are cracking and are probably good for one more season. I have had 20 year old boats that weren't taken care of as well but still had original upholstery. The only thing I've done differently with the Donzi is use magic erasers (genuine) and vinyl conditioner. Look at my seats on a 2005 model, garage kept boat . Are they just made out of crappy material or could it be the magic erasers or conditioner? It's not the stitching that failed on the bottom, the vinyl cracked at the seams.