Craftsman-built frame is constructed using solid, reinforced hardwood for lasting strength and stability. Frame support system features no-sag springs made from recycled steel. Seat cushioning and backrest contains dense foam made from partially plant-based material, padded with poly fibers. Solid steel swivel base allows 360-degree rotation. We want you to love your Cerrito as much as we do. We recommend ordering a material swatch prior to purchase, ensuring the perfect color choice.