Frame Bench assembled Engineered wood frame assembly reinforced with corner blocking and kiln dried solid wood spring rails for warping prevention. Cushions 2.8 lb. high density polyurethane foam combined with layers of fiber for superior seating comfort. Slight softening and flattening of the cushion will occur as a result of normal use aging but are inherent characteristics. Contains no flame retardants or harmful chemicals. Legs Rubber wood Suspension High gauge Sinuous Spring seat platform suspension (when applicable) balanced by a synthetic webbed back construction for a resilient and well balanced sit. Assembly Screw on legs Glue and Stains Water-based, low-VOC Size Variance Dimensions of bench-made upholstery may vary slightly.