Wooden structure. Padding in non-deforming fire-resistant polyurethane. The spring system consists of elastic belts. Automatic tip-up seat with joints in noise-damping nylon. Upholstery in Pelle Frau® leather from the Color System, fabric or velvet, produced entirely by hand using traditional upholstery methods. On request, the Pitagora chair can come with a wooden panel on the backrest and under the seat and a foldaway writing table, as well as structural and colour customisations. Installed in rows using metal bases finished with scratchproof and shock-resistant epoxy powder paint.