The box indicates the recommended (well, or optimal) load on the chair is 200 kg. With my 150 kg. sit comfortably (although I lower the mechanism as much as possible down). The chair is very comfortable. In difficult periods of an overabundance of earnings, I even podkimaril from fatigue in my chair. And in this case, it is pleasant to plunge into the world of dreams. The fastening of the arc of the armrests to the back is constantly loosened. In this case, it is enough to add a Grover washer (spring) to the screw to minimize the number of unscrewing. The assembly of the chair is both convenient and not convenient at the same time. Let me explain: I assembled it quickly enough, but it’s not easy to assemble it alone, especially where you need to simultaneously fasten the seat, backrest and armrests. I understand that this is a trifle that you will encounter once during assembly. But I must warn you. I don't regret buying it. But I don’t jump or sway in a chair, so I didn’t check it for stress resistance.