We stole your light - when you need darkness.This is a real blackout curtain that you can see the difference. Open the lightweight fold and it will be fully shown before your eyes. It is charcoal with a high-end linen look. Hang it up, close the curtains, you can feel the temperature and light inside and outside being separated by curtains. The sky is already brightUnless we evolve beyond a light-regulated circadian sleep/wake rhythm, we need to accept the relationship between light and sleep.Now, thanks to the eco-friendly blackout coating on the curtain, we cut off the light from every place. No need to evolve any function, you can control the light.Like a vacuum cupReal 2 layers fabric—forms an insulating layer, wrap the cool in the room. Save energy in the summer. You can save up to 30% on the electricity fee, and you can offset 15% of the energy tax.Let's summarize all its features.-Ultimate Blackout-Thermal insulated, helps to keep room warm or cool.-Soundproof, creates a peaceful environment for you.-Lining inside, white fabric lining facing outside