Sound Proof Foam Panels, Soundsbay Acoustic Panels Sound Absorbing High Density Fire Resistant, 12 Pack Soundproof Wall Panels for Home Studio, with 60pcs Double-Side Adhesive, 12" X 12" X 1"

This is one of those products we're you have to follow the instructions or the product is a flop. I opened the vacuum sealed bags and waited the 48 hours and the panels still didn't look good. I soaked them in warm water and threw them in the dryer for 30 minutes and they all expanded perfectly. A good value for the money. The adhesive squares are strange though, I much prefer a roll of tape.

Edit; The seller saw these comments, reached out, and offered me a refund. I took a refund on one of the four packages that I bought. EXCELLENT customer service. Much appreciated for the seller's proactive response.I bought 4 packages (48 tiles total). Easy to apply and use, and does a decent job for this price point. However, the way they cut and pack the product, there were 2 tiles in each package (total of 6) that stayed compressed on one edge and did not expand when opened, so they don't line up well and you lose about 1" of total coverage effectiveness.

Not acoustic foam by any means. In my testing I find 0 difference with or without the foam. It is too low density, and too thin to offer anything but looks.

The media could not be loaded.  Overall pretty good

These smell absolutely horrible once opened up. They smell like dead and rotting fish. No matter what I do I can’t get the smell to leave the panels.