The back of the chair is the focus of Hans Wettstein's design for the Hola chair from Cassina. Its curvaceous back forms two short comfortable arms and the silhouette flows around the chair's whole form. The upholstery covers the entire chair and is removable. The internal steel structure is padded with CFC-free polyurethane foam and polyester wadding. The sleek, timeless design is available in a wide range of upholstery fabrics and leathers.