within 3 weeks the first one was a "sinker". At 185 lbs, I would not think it would sag that much. Wayfair was great and sent a replacement and with the same amount of time the seat sinks at least 6 inches when you sit in it. The chair was not abused and only used maybe once a day for some reading. The material was nice but the sink makes you feel like you are sitting over a bucket