Please feel free to ask any questions in the comments. Hansleep Curtains, 1st Grade Blackout, Set of 2, Thermal Insulation, Cold Protection, Soundproof, Energy Saving, Thick, Plain, Stylish, Washable, for Bedroom and Living Room (Gray, Width 100cm x Length 170cm) ◆【First Grade Blackout】These curtains have a blackout rating of 99.99% or higher, blocking almost all light from the outside, making the room dark enough that you can't see the expression on someone's face when the curtains are closed during the day. Even with the same grade, the degree of blackout varies depending on the brightness and color of the curtains. Light, pale colors tend to let light through, while dark, deep colors tend to block light. We recommend dark colors for those who prioritize blackout. ◆【About the Fabric】These curtains are made of 100% polyester fabric. They are soft and smooth to the touch with a matte texture. The high-performance fabric provides first-grade blackout, heat insulation, thermal insulation, and soundproofing. The front and back of the fabric are the same color, making it easy to use as a room divider. ◆【Suitable for All Seasons】Blackout curtains have the significant advantage of being less likely to transmit heat and cold due to the high density of the fabric. They prevent the room temperature from rising in the summer and from falling in the winter, improving the efficiency of air conditioning and heating. Especially if you use blackout curtains in a room with strong afternoon sun, you can expect to save on your monthly electricity bill. ◆【Triple Weave Technology】The fabric utilizes a triple-layer technology that weaves in black yarns, providing excellent blackout functionality. These thick blackout curtains effectively block sunlight and UV rays from the outside.