Frame is solid birch wood. Solid oak legs (removable) in finish of your choice. All of the wood used is sustainably sourced. Hand upholstered in your choice of Olefin or Performance Velvet fabrics Olefin: Non-toxic, scratch- and stain-resistant. Performance Velvet: Stain-resistant & includes velvet brush. Choose between sloped, arched or block arms. High-gauge sinuous springs provide cushion support. Cushions are foam and fiber filled. Seat firmness: Soft. On a scale from 1 to 5 (5 being firmest), it's a 1. Olefin cushions are reversible (tufted on one side, smooth on the other) and Performance Velvet cushions are non-reversible. Cushion covers are not removable. Legs feature adjustable levelers to adapt to varying floor levels. Includes built-in USB with 72" power cord. Sectional pieces connect via modular attachments (included) underneath each piece. Assembled in the USA.