The Dal ErgoSelect Stride chair features all the ergonomic and comfort features you would expect in an ErgoSelect chair- lumbar pump, seat slide, 3 lever mechanism, ratchet back height adjustment and the option of arms | The back is now available in 3 sizes to suit more users and has been upgraded to include Gelform gel for added comfort | Available in Dal Apollo Black fabric or can be upgraded to any of the 18 Gravity colours | Ergo seat in 3 sizes Gelform back in 3 sizes all with lumbar pump Ratchet back height adjustment 3 lever ergonomic mechanism with tension adjustment Seat slide Dal Apollo black fabric