System of seating formed of a single shell using 3D ply moulding technology in several wood finishes or totally upholstered in fabric or leather. 4 star aluminium base, 4 legs base or sled base, which are either mat chromed or powder coated. Stool with three different fix height or height adjustable with swivel seat on sandblasted stainless steel AISI 304 and base covered by a stainless steel sheet with “linen fabric” pattern.