"Blackout shades" refers to window coverings or curtains that are designed to completely block out light from entering a room, creating a dark environment.
Sentences with «blackout shades»
I recommend using blackout shades for sleepy time so that the light doesn't keep them up. (babysleepforme.com)
Make your room as dark as possible with blackout shades and keep your bedroom a screen - free zone. (entrepreneur.com)
When I say a dark I mean like blackout shades on the windows kind of dark. (twiniversity.com)