Two unusual features help to increase the comfortableness of Apple: first, the fact that the chair - thanks to a special hinge structure - gently closes when prompted by a person’s weight, and second, because Apple moves back and forth like a rocking chair.
Apple has a structure made of polyurethane foam, which is reinforced with a tubular steel frame. It has an integral polyurethane base. Upholstery is technically removable.