emma + oliver 24/7 500 lb. big & tall black leathersoft ergonomic office chair with loop arms emma + oliver this big & tall leathersoft executive office chair is an ideal chair for larger and taller professionals who spend long hours sitting behind a desk. an extended upper back with integrated headrest and built-in lumbar support reinforces healthy posture. the 22" wide swivel seat is double padded with 4" of foam. leathersoft is leather and polyurethane for added softness and durability. raise or lower the seat using the pneumatic height adjustment lever for a custom fit. generously padded loop arms reduce pressure on the shoulders and neck providing additional comfort. turn the tilt tension adjustment knob to increase or decrease the amount of force needed to rock and lock the seat in place with the tilt lock mechanism. this sturdy chair has a heavy duty chrome base, smooth rolling dual wheel casters and a 500 pound weight capacity. whether you're buying chairs for a 911 dispatch office, call center, or control room, this 24/7 intensive use office chair is the right chair for the job.