Complete Blackout: Tired of Light Pollution Disrupting Your Sleep?. Our blackout window cover is primarily made from polyester, capable of blocking 100% of UV rays. However, the thickness is less than traditional curtains and may have fold creases which may result in a slight decrease in interior aesthetics.
Magnetic Blackout Window Cover, 100% Darkening, Cuttable, No-Drill, 39×57 Inches
Magnetic Blackout Window Blinds No Drill Cuttable Room Darkening Curtains Blackout Shades Window Cover Traceless Removeable. Complete Blackout: Tired of Light Pollution Disrupting Your Sleep?. Our blackout window cover is primarily made from polyester, capable of blocking 100% of UV rays.