This chair is as hard as a rock. My tailbone was in pain for the whole week I used this chair. I ever purchased a cushion and the pain was still there. Returned.
The chair is very comfortable. My beef is with the assembly. The wheels were near impossible to attach to the base. A call to the support number was not real helpful as the solution still was extremely difficult to implement. There was nowhere to hammer on the wheels to get them installed so I had to exert an undue amount of force to even get them started. I would not recommend this chair.
It is NOT black. It is relatively small. We were able to leave off the arms so it fits well in front of my sewing table. Comfortable. Rolls well. Very pleased with my purchase.