Help - blackout curtains?!

Ma

Hey mamas, I need your help with some good blackout curtain recommendations. I have bought two sets now - one from Walmart and one from Amazon. Both did not work. The Walmart ones may have kept light out a bit better than a sheer curtain, so were definitely not blackout. My poor daughter’s room gets all of the intense afternoon sun, right until sundown. We now have a blanket up for bedtime sleep 🙈. What did you guys buy that worked well and actually kept the light out? Thanks in advance 😊