Myka's Ergonomic Leather Executive Office Chair High Back Computer Chair with Upholstered Armrest Brown This office chair designed with human-oriented ergonomic construction for providing comfort sitting experience. The office desk chair has rocked back and forth. 360-degree swivel, heavy-duty nylon base and nylon smooth-rolling casters for great stability and mobility. BIFIMA certification,more reliable and sturdy, maximum capacity up to 250 lbs. When sitting at a desk for more than 8 hours a day, the body will start to become very agitated and you may start to experience some pain in the lower back. well designed ergonomic chair with good adjustability will allow most users of different sizes to achieve good support. Modern executive chair is developed having your comfort and health in mind. Forget about back pain caused by sedentary sitting with the well-padded backrest and soft seating surface. The contoured back of the chair helps relieve lumbar and leg pain, at the same time improving your posture. Warranty: Guaranteed free exchange or full refund for any quality problem within 90 days after purchasing. Free replacements for damage parts and missing parts within 365 days after purchase.