Has leaked over and over again. I’ve patched each chair about 8 times in 2 years. The seams are weak single stitch and the nylon easily frays. A thicker material and stitching would have made it much more durable. 
Additionally, I didn’t realize they sell refills not because of leakage but over time the foam compresses and gets smaller. So the chairs deflate and the only solution is to add more material to it. 
Overall these chairs are meant for the landfill.