Metal Chair with upholstered seat. Metal chair with upholstered seat. Metal chair with upholstered seat. The Hump back metal side chair is constructed with a metal frame and a vinyl seat. Stylish and durable, this chair is a must have! Ideally this chair should be cleaned with mild soap and water. Made for the commercial atmosphere but great for the home for years and years of use, seat is machine pressed for a sleek clean look 2" thickness and available in many powder coated frame finishes and plenty of seat options with a rated 500,000 double rub vinyl.