William monobloc sofa features a polished aluminum alloy base and a steel frame with elastic strap suspension. The seat padding combines polyurethane and thermobonded polyester fiber, while the backrest and armrests include flame-retardant foam and thermobonded polyester. Goose feather cushions with polyurethane inserts provide extra comfort. The sofa’s internal cushions have removable nylon and cotton covers, and the external cover is detachable in Extra 0438 leather.Finishes, dimensions and upholstery can be customized; please contact the Concierge for more information.