These blackout roller shades allow no light to filter through the fabric to provide complete privacy. Using high-quality materials, these are to eliminate glare, minimize incoming heat, and protect furnishings and floors from damaging UV rays. Its contemporary design adds style while preventing sunlight from entering the room. for any room in the house, especially for bedrooms. The easy-to-use cordless design allows for precise height positioning and is a safer choice for homes with children or pets. SPECIFICATIONS Material:  Polyester Blackout: Cordless blackout roller shades block most natural light from coming into the room, making them a good choice for bedrooms, baby nurseries & kids rooms, and media rooms. If you want to install the blind inside the window frame, measure horizontally, at the top of your window sill. Round to the nearest whole number. If you want to install your blind on the outside of the window sill, measure the top of your window sill. We recommend adding 3-4 inches to the width and length, to ensure full coverage. Be sure to measure your window correctly.