Review on 🎨 XCEL Extra Soft Craft Foam Roll - Distressed Grey - 54x12x1/4 Inch - Perfect for DIY Crafts! by Morgan Gilmore

I bought them for two air vents in my room that happened to turn up in my old house. Above the grate you can see directly into the neighboring room. They fitted the walls almost perfectly but I tried to glue the back and it didn't stick so I had to glue them to the wall face down which would probably ruin the paint if I ever take them off what i don't intend to. It was hard to get them to stick, but they don't let in the light from the other room and the noise. You can also cut to exact measurements which is nice.