Mercer Fire Retardant Panel, Black Flame Retardant Fabric, certified by the National Fire Protection Agency (passes NFPA701 50x84 full window panel available in 4 designer colors. Back Tab Window Panel  hides the rod and hangs beautifully. Easy Care -- Machine Washable Polyester. Pella fire retardant back tab window panels with unique gridline weave drapes beautifully.