Nanuk pre cut sized Appalachian Tough gun case foam - Choose your thickness to fill your Nanuk gun case. Appalachian Tough Gun Case Foam is the only foam specialized just for gun cases. Extra firm open cell foam is formulated to prevent the absorption of moisture from the air, While keeping your guns in place with an Extra Firm Material. The lightweight foam will not add added weight to your case and is easily customized with a razor or carving knife. The Nanuk pre sized foam comes as a full piece and is not cut with little cubes as the standard stock foam is. The corners are squared off for a strong holding point in your case or you can trim them off for a custom fit.