Plano pre cut Sized Appalachian Tough gun case foam - Choose your thickness to fill your Plano gun case. Appalachian Tough Gun Case Foam is the only foam specialized just for gun cases. The Soy based open cell foam is formulated to prevent the absorbtion of moisture from the air, While keeping your guns in place with an Extra Firm Material. The lightwewight foam will not add added weight to your case and is easily comized with a razor or carving knife. The Plano pre sized foam comes as a full piece and is not cut with little cubes as the standered 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.