Multifunctional Window Insulation Curtain - Functional benefits: This thermal curtain can effectively prevent heat loss in winter, block cold air from entering, and prevent cold air from escaping the room in summer, while blocking most of the light and reducing outside noise. - Easy to clean and durable: The insulated window cover is made of polyester and cotton, more waterproof and durable than EVA material, and it also helps block wind and rain. When dirty, wipe clean with a damp cloth. - Blackout and privacy: These window insulation set curtains are paired with a waterproof backing to create blackout curtains that help block streetlights and glare, providing a private bathroom environment and additional privacy. - Warm and soundproof: The four-layer thickened window cover not only prevents cold air from entering the window to keep the interior warm in winter, but also fully absorbs noise, creating a quiet and comfortable indoor environment and improving sleep quality.