Camco's RV Black-Out Vent Insulator with Reflective Surface blocks the sun's damaging rays. It fits standard 14-inch RV vents, reduces heat transfer and increases A/C efficiency. The vent insulator helps keep your RV cooler in the summer and warmer in the winter. Made of three layers—a reflective layer, a foam insulating layer and a synthetic fleece layer that provides UV ray protection. Features a full 2 ¾-inches of foam to help stop heat transfer. Color: black. RV Vent Insulator with Reflective Surface: Blocks the sun's damaging rays; Helps keep your RV cooler in the summer and warmer in the winter RV Vent Insulator with Reflective Surface: Blocks the sun's damaging rays; Helps keep your RV cooler in the summer and warmer in the winter Compatibility: Fits standard 14-inch RV vents 3-Layer Protection: Includes a reflective layer, a foam insulating layer and a synthetic fleece layer that provides UV ray protection Features: A full 2 ¾-inches of foam to help stop heat transfer