KEY DETAILS Solid oak and engineered wood frame. All wood is kiln-dried for added durability. 360 degree metal swivel base. High-gauge sinuous spring cushion support. Seat cushion has a fiber-wrapped, high-resiliency polyurethane foam core. Seat firmness: Medium. On a scale from 1 to 5 (5 being firmest), it's a 3. Loose seat cushion with zip-off cover. This contract-grade item is manufactured to meet the demands of commercial use in addition to residential. See more . Assembled in the USA. How to measure for delivery