[user_235711]

I believe it is known as a task chair (since it lacks armrests and is not too expensive), but for me not having armrests is the single most important aspect of a coding chair. If armrests are present, chances are that they will prevent me from pulling up to the desk completely - since they hit the desk before my body does - and as a result I will have to lean forward (and by extension begin to slouch) in order to reach the keyboard.