Seat Specifications These seats are classified as high-quality outdoor furniture, and are characterized by the following: Materials: Made of solid wood slats (or treated, corrosion-resistant wood) with a frame and structure of durable cast aluminum or cast iron. Resistance: Designed to withstand various weather conditions such as high temperatures, rust, and rot. Design: The model shown in the picture is available without a backrest, and other models are available with backrests and armrests.