Track "Tapis moquette" has become a street anthem. Passenger accommodation consists of longitudinal bench seating with grey moquette seat covers. The trains were originally delivered with seats with a mauve and grey moquette. The seating was trimmed in customer's required moquette. The longitudinal seats are covered with a green moquette. Standard-class cars have longitudinal seating with dark blue moquette seat covers. The seat upholstery features a moquette by fabric designers Wallace Sewell. These units were delivered in a white livery, with Southern green doors and Southern moquette. They formed the letter J for Jubilee (the Northern line's moquette formed the letter N). There is a new pattern of moquette for the seating, manufactured by Camira Fabrics. A long-standing moquette manufacturer is Holdsworth Fabrics which dates back to 1822. Traditional moquette fabrics are made from a wool nylon face with an interwoven cotton backing. Moquette originated in France, where it was woven by hand.