This PolarBear WeatherProofing Interior Window Insulation Kit comes with 5 pieces and is perfect for keeping your home cozy during the cold winter months. The kit is designed for use on interior windows and is made from high-quality materials that ensure maximum insulation. The kit includes everything you need to install it quickly and easily, and it is suitable for use on most types of windows. With this window insulation kit, you can save money on your energy bills and enjoy a warm and comfortable home all winter long.