Noise Barrier Detachable felt liner in the middle is made of damping material which can help absorb annoying noise. Different people have different reactions to curtains’ noise canceling effect.Note that these curtains are not 100% soundproof.
4-In-1 Soundproof anti Dust 100% Blackout Curtains with Melt-Blown Layer Noise R
Also, balance the temperature of the interior spaces by blocking sunlight & draft out and lower your air condition cost achieving energy saving. Backside is white color. No toxicant or formaldehyde.