Sitting in this chair will take you to the outer limits of comfort and function controls. The breathable R2 SpaceGrid mesh back features adjustable Lumbar Support, a molded foam mesh seat and flip arms. Get the recommended daily usage of 6-8 hours when work demands a full day. Overall Dimensions: 42 3/4H x 25 3/4W x 24 1/2D. Weight capacity tested to support 250 lb. Contoured back provides continued support to help you feel refreshed. Lumbar feature supports your lower back and enhances the natural curve of your spine. Use the synchro-tilt to recline the chair back at a higher ratio than the seat to encourage proper back alignment. Accommodate your individual weight and work styles with tilt tension. Tilt tension adjusts the resistance when reclining. Tilt locks the chair in an upright position for constant back support when not reclining. 4-way adjustable arms are padded and flip back out of the way for comfort versatility. Heavy-duty nylon base with casters for easy mobility. Assembly required. GREENGUARD certified - certified for low chemical emissions: UL.COM/GG - UL 2818. Ranked in two tiers: Certified and Gold. Less harsh chemicals - made with fewer harsh chemicals, or safer chemicals than typical alternatives, helping reduce your use of and exposure to substances that may be more harmful to your health and the environment.