Steel frame construction. I would recommend this chair and buy it again.

But now I'm realizing it: This chair wants to make me healthy! Lumbar cushions, neck cushions... Things you don't find on a normal office chair! Comfortable, supportive... unusual! My body has always been more "hunchback at the top, hollow back at the bottom"! Now the chair is trying to correct both!

The chair looks very solid and stable from the very first moment, so you don't have to worry about the workmanship. When you sit on it, it's a real treat for your body and the supplied cushion provides excellent support for your lower back, and the head cushion is also a nice feature when reclining.