the S 220 is a material-efficient, stackable molded plywood chair with an ergonomic seat shell and a light tubular steel frame. Featuring optional armrests, the chair can be used in a variety of settings – from private homes to the contract sector – and is available in a range of different woods and colours.

https://www.archiproducts.com/en/products/thonet/stackable-chair-with-padded-seat-with-armrests-s-220-spf_749265