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

I've bought two DXRacer chairs now, and both times the shipping was insanely fast—my first one showed up in a day, and the second only took two. These are by far the most comfortable gaming chairs I've had, and they keep getting better with more color and design options. Plus, I really like the lumbar support pillow that came with it.

The adjustment options are perfectly adequate. The backrest can be tilted backward by 135° so that you can watch a movie on the PC and lean back comfortably. The height adjustability of the chair itself and the armrests is also fine. I would therefore give it a clear recommendation for anyone who likes to sit in front of their PC for long periods.