The HÅG Conventio 9520 comes with a fully upholstered seat and backrest. Aluminium legs available in either black or silver. Dress up the chair for dinner at night with a HÅG SlipCover as an optional extra. HÅG in Balance® technology ensures more subconscious movement. Armrests and the HÅG Writing Tablet available as optional extras. The chairs can be stacked fifteen high.