Top layer is constructed from durable, Sunbrella quilted acrylic with a poly/cotton bottom layer. Innovative, weather-resistant fabric is quick-drying and engineered to last 2 to 20 years longer than other materials used in outdoor furniture. Cypress wood spreader bars. Cushioning provides maximum comfort. Secured by strong 12" chains on each side. Stainless hardware. Recommended use with 12" chain and spring clamp. Also fits the RST Outdoor Big Daddy Hammock set #52399.