Room Treatment Progress / 4298_2_inch_panels This is the primary panel size installed around the side walls of the room - 2" Owens Corning 703 fiberglass with some batting mounted on peg boards, white burlap fabric. The edges on the panels are reinforced with plastic drywall corner protectors ($1.60 for 10 feet at Home Depot). This makes a very nice 90 degree edge even when the burlap is pulled very tightly across the panels.