Here is a vintage Obus Forme ergonomic high backrest and seat. There is a stain on the cover, but the cover is removable for cleaning. New versions have the backrest and seat as separate pieces. The label on the back reads "Obus Forme The original orthopedic brace , upright support the wide back-rest support Made in Canada."
Obus Forme Obusforme Ergonomic High Back Seat