Having the right office chair is one of the most important aspects of a productive workplace, considering the amount of time the average office worker spends sitting. Alera Elusion II Series Mesh Mid-Back Swivel\/Tilt Chair with Adjustable Arms goes beyond the basics. Four-way adjustable arms move up and down, as well as pivot in and out, to help you find the optimal position for your arms to rest. The breathable mesh back keeps you cool, even when your office is warm. Contoured molded foam fabric seat provides a comfortable place to sit. Ergonomically designed chair frame encourages proper posture. Height adjustable ratchet back gives you the lumbar support you need throughout your workday.