Owens Corning R-21 Un-Faced Fiberglass Insulation Batts 5.5 in. x 15 in. x 93 in.Product Description The Owens Corning R 21 Un Faced Batts offer a versatile and efficient insulation solution for various applications such as roof ceiling and interior exterior walls. Ideal for use in both wood and metal framing cavities or between furring channels, these fiberglass insulation batts are easy to handle and install. They can be precisely trimmed with a utility knife to fit any space. The batts not only meet thermal specifications but