To support your waist and give you free to move ! 

ROICHEN posture correct chair got leg and wheels ! 

Finally found the perfect angle – Freedom from back, neck and head pain

No armrest and headrest => if there is a headrest and armrest, you will lean on either side and your posture will inevitably be disturbed. For perfect  concentration, the factors that make bad posture are boldly removed. 

Freedom with silent wheels => move wherever you want, without noise!