HILADUO Roller Shade 0%, Blackout, White/White.About the Omega Blackout Series:The Omega Blackout collection takes our classic, versatile standard to the next level of function. This fabric is woven with single-color threads and engineered with a 100% light-blocking core. It offers the same timeless, uniform texture as our solar screens but with the added power to completely darken a room for ultimate privacy and rest.Visibility & Light Control:White/White (Light Color) + 0% Openness (Blackout): Pure brightness meets total darkness. The White/White surface reflects indoor light to keep your room looking spacious and airy. However, the 0% blackout construction creates an impenetrable shield against sunlight, ensuring that while your room looks bright, no external light can disturb your sleep.