Owens Corning R-13 Unfaced Fiberglass Insulation Batts 3.5 in. x 15 in. x 93 in. (5 Bags)Owens Corning R 13 Unfaced Fiberglass Insulation Batts The Owens Corning R 13 Unfaced Fiberglass Insulation Batts are versatile and easy to install. They can be fitted into wood or metal framing cavities, or between furring channels, offering a seamless integration into your construction project. The unfaced design allows for greater flexibility in vapor barrier placement, making these batts suitable for a wide range of climates and building designs.