I just moved into a very sunny apartment (windows facing due east and due west with no buildings obstructing sunlight), and tried in vain to find blackout curtains that actually blacked out the light. On my third attempt, I found these, and they are just fantastic. Truly block out the light, but also look and feel better (softer, more attractive, no white foam backing) than the other so-called blackout curtains I tried. Also, the back-tabs make it easy to hang tastefully on either curtain rods or tension rods - it doesn't look scrunched like other simple rod curtains do. This really is a terrific buy. Well worth my money.