The chair is comfy and i use it all day for my job working from home. the arms are meant to be up or down, not half way. i sometimes like to put them half way just to relax my arm in an upward position but the arms just fall right back down slowly as if it has oil in them and i could see anything like a screw or a way to tighten them. so thats why i dont think they are meant to be half way, just up or down. otherwise, good chair and would purchase again!!!