My old chair was worn-out and cracked in every nook and cranny, so a new was needed. The HJH Office / Officechair24 634500 office chair / executive chair Camaro Office Chair In SportDesign I chose, because he has a steel hub compared to other chairs. I sit for about 2 hours on the part and notice how much my back pain disappear. In yet no other office chair I had such a good seating comfort. The building is also done without guidance very quickly (about 10 min.). Here I can only express an absolute buy recommendation.