the zipper on my cushion cover has fallen apart in about a year. i ordered a replacement cover from sportaid and the order must have got screwed up because after a week i called supracore and the order was just being shipped out. i called supracore not only to figure out where my cushion was , but to ask about the zipper falling apart. i was told they had problems with the zippers and have changed them over the last year and the problem should be resolved. So, i finally got my new cover and went to put it on my cushion. there seems to be a lot of excess fabric on inside of cover by the zipper, so i was carefully trying to zip cover and it snagged. as i was carefully trying to unsnag the zipper, knowing how crappy the zipper was on other cover, the teeth started popping off the zipper. New cover now is crap and never even sat on it. will see how good they are with warranty or if they say it is my fault and if I have to pay shipping to get another replacement. I love this cushion, but it was high priced and $70 a year for new cover makes the varilite look like a better option.