BIG AND TALL OFFICE CHAIR FAMSINGO 400lbs office chairs have been certified by BIFMA and SGS. This office chair for heavy people uses a sturdy chassis, a Class 4 gas lift, and a five-star feet with strong load-bearing capacity, which is more stable and durable. MESH OFFICE CHAIRThe seat cushion of FAMSINGO mesh desk chair is filled with high resilience sponge which is designed for the curve of humans butt, providing soft but supportive sitting feeling. The comfortable office chair uses a breathable mesh design to prevent the accumulation of sweat and heat. RECLINE & LOCK FUNCTIONThe backrest of this home office chair can be tilted backward, which helps reduce the pressure on the lower back muscles and relax the lumbar area. The recline range is 30 degrees(from 90 to 120 degrees). Plus, you can recline and lock in any degrees. ERGONOMIC OFFICE CHAIRThe gas lift and tilt-tension mechanism allows to adjust height, seat tilt and tilt tension. 2D armrests that are adjustable