Ratchet back height adjustment high resilient molded foam used on every seat and back, with a detailed upholstered treatment. Arm options A6 and A7 arms feature Ura-Soft® pivoting arm pads that also slide forward and back for greatest comfort, along with locking height adjustment. A7 models add 4” arm width adjustment. Several fixed conference arm styles are available as well as adjustable height ‘T’ arms. Waterfall seat front promotes circulation and good health.