I'm so very disappointed with the performance of this chair. I only received this chair last week and have been away up until today and therefore have only sat on it for less than a few hours and already the seat is showing signs of sagging, quite drastically.  Goodness knows what it would look like after a full days work.  For £133, I expected better but loved the look of the chair as it didn't look too corporate office.  i will be contacting Wayfair to return this item as it isn't fit for purpose.  Ps I weigh 10stone which i don't think is excessive