Made from #1 kiln-dried pressure treated pine or cedar, the 48 inch rollback design offers the most comfortable style with smooth gliding range. Seat fully rolls at seat bottom and top of backrest for ultimate comfort with lumbar design that contours seat into backrest. Authentic  handmade craftmanship with quality construction highlighted with 1 inch thick slats attached with screws,  zinc plated hardware is rust and corrosion resistant.