ÄLVDALEN 3-seat sleeper sofa with chaise, Knisa dark gray, Width: 77 1/8 ". It might be hard to believe that a comfy bed is hidden in this stylish sofa. ÄLVDALEN is easy to fold out to get a good night's sleep, comes with a storage space under the seat – and many features to love. Fabric: 100% polyester (min. 90% recycled).