571 Back-Wing Armchair is a comfortable armchair created by Patricia Urquiola for Cassina. The frame of the armchair is made of solid wood, clearly demonstrating Cassina's expertise in wood craftsmanship. The ergonomic backrest of the Back-Wing is curved and sits elegantly around the body, making it extra comfortable to sink into the chair. The armchair is made of flexible polyurethane foam and upholstered in leather. Back-Wing is fitted with edging strips that elegantly define the profile of the chair's backrest. The armchair is available in one size with several colors of upholstery.