Collection includes: Torsion® Stack Chair, Torsion Tandem, Torsion Task, and Pedestal Stools with optional foot ring. Lightweight and small in scale, Torsion chairs allow quick and easy movement. Exceptional comfort in an inexpensive task chair. Passive ergonomics with smooth back flex. Contoured and waterfall seat with lumbar support. -Poly or upholstered seat and back -Armless or T arms.