With its floating backrest, Crown Armchair from Stockholm's Massproductions lends some welcome airiness to the concept of upholstered seating. Seemingly unsupported but in fact relying on a concealed steel joint. The open-back design is a clever turn from designer and cofounder Chris Martin. It adds a note of playfulness and light-handed visual appeal to the completely upholstered form, available in an extensive choice of high-quality textiles.