The Breeze Stop 36" Surround Insulation Panels in White are designed for indoor use with a window AC unit. Made of foam material, these panels provide insulation to help keep your home cool and comfortable. With a sleek white design and easy mounting location on the window, these panels offer a convenient solution for improving the efficiency of your air conditioner. The Breeze Stop product line is known for its quality and effectiveness in reducing hot air infiltration, making it a reliable choice for home improvement projects related to heating and cooling systems.