Flash Furniture High Back Black Leather Executive Swivel Office Chair With Lumbar Support KnobGet your day going with this contemporary executive office chair that boosts titanium finishes. Having the support of an ergonomic office chair may help promote good posture and reduce future back problems or pain. High back office chairs have backs extending to the upper back for greater support. The high back design relieves tension in the lower back, preventing long term strain. The tilt lock mechanism offers a comfortable rocking reclining motion.