Internal fiberglass support structure, crafted with special cuts and ribbing that make the seat comfy. Polyurethane foam and polyester wadding padding. The two-tone Charlot fabric cover (100% wool), coupled with polyester wadding, is removable thanks to two side zippers that give it a unique finish. One-of-a-kind piece, no longer in production. This piece has an attribution mark, I am sure that it is completely authentic and take full responsibility for any authenticity issues arising from misattribution