Ikea Markus Leather Executive Office Chair IKEA Markus is a high-backed chair that comes Black and leather with a mesh back for breathability. It is remarkably comfortable. It is height adjustable and can tilt and lock, but don't expect to independently adjust the armrest width or height, or change the seat depth. The curved design and the mesh back to support your back, however, and the seat pan isn't really deep enough for you to slouch or sit improperly, so it does enforce good posture. If you're on a budget but want a quality desk chair, it's a great bang-for-your-buck office chair.