• Swivel with height adjustment mechanism or, swivel with height adjustment mechanism and recovery in position and height when leaving the seat. • Seat and backrest in flexible high-density polyurethane foam, flame-retardant. • Backrest with metal frame structure inside. • Front footrest in stainless steel tube that goes up and down with the seat, keeping a constant distance. • Option of a cone shaped base (TRUMPET) or of a five-point star base (FIVE STAR). • Possibility of adding a BUMPER border for seat protection.