Each frame is constructed from mixed hardwoods and multi-ply furniture-grade plywood for quality and durability. The seating support system features heavy-duty, 8-gauge No Sag sinuous steel wire springs to provide uniform support. Every seat cushion contains 1.6 Luxuron foam cores, complete with a Dacron polyester fiber wrap, to provide the maximum in comfort and durability. Each spring is connected with Hartco steel clips and 16-gauge border wire for added strength. 11-gauge No Sag springs and cushions and pillows filled with high resiliency polyester fibers provide the back support system with the ability to ensure your complete and total comfort. Specially designed from environmentally friendly materials, BioFlex Hybrid Foam is flame retardant and offers improved UV resistance.