It turns out they do make them like they used to. The traditional design of the 507 slat-back series marries nostalgia with solid, modern construction. Double-walled, high density contoured polyethylene seat and back offer lasting style and comfort. The 507 Series includes the 507P, with upholstered weather-resistant copolymer Spirit® seat, and the 507S, with upholstered weather-resistant steel Stellar® seat.