$57.99 Room-darkening shades become extra dark with sidetracks! Not to mention SO energy efficient 
Amazon.com: Keego Window Roller Blinds Office Blackout Window Shades, Room Darkning Bedroom 
Blackout Window Shades Ideas in 2020 | Curtains with blinds, Window shades blackout, Blackout 
:max_bytes(150000):strip_icc()/02d5abd4-c215-e811-946d-0a986990730e-9a8ac114e5cd4844b807f5158d3a0769.jpg "The 8 Best Blackout Shades of 2021")
