Frame Bench assembled Rubber wood frame assembly reinforced with corner blocking and kiln dried solid wood spring rails for warping prevention. Cushions 2.8 lb. high density polyurethane resilient solid foam core that provides structure and durability. Contains no flame retardants or harmful chemicals. Joints Glued, stapled and screwed to ensure frame stability and longevity. 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 None Style Loose back; loose seat Glue Water-based, low-VOC Size Variance Dimensions of bench-made upholstery may vary slightly.