Injected flame-retardant foam with structure in steel and base in heat-formed shockabsorbent black plastic. Back support in varnished ash. The collection is upholstered in: a) top of the seat and front part of the backrest in leather or fake leather glued to the polyurethane foam. b) sides of the seat and back part of the backrest in fabric. We suggest to use elastic fabrics present in the hangers Elastic 1,2 and People for Gentry. The X-Chair collection covers are not removable.