Sofa set is made of durable polyurethan foam and expands out of box which could take up to 24 hours to expand fully, there is no assembly required, non slip bottom. It has hook and loop to secure placement of seating and soft plush fabric.Details:GrayAssembled size corner: 28" x 28" x 15.5"Chair: 28" x 20.5" x 15.5"Ottoman: 20.5" x 20.6" x 19.3"Polyurethan foamNon slip bottomRemovable machine washable coverNo assembly requiredExpands out of box which could take up to 24 hours to expand fully