TroyStudio Acoustic Panel - 16 x 12 x 0.5 Inches 6 Pack Dense Thick Soundproofing and Sound Absorbing Panel, Wall and Ceiling Acoustical Treatment Felt Tiles for Recording Studio, Home

They seem thick and good quality, have almost no smell at all (have to put nose right up to it to even know you're smelling something). I like that there's no adhesive since I can use smaller, wall-friendly adhesive strips as opposed to covering a large surface area that would be hard to clean which makes installation and removal easy. I've bought one 6 pack so far. It has made a relatively small difference at sound penetration outside of the room I installed them in, however what I found most effective was placing one under my laptop where the speaker are, and the sound that comes out of them is significantly less piercing but still enjoyable. The gray color is very neutral and goes along with a lot of different paints/color schemes. What is most noticeable after installation is inside the room there is no echo when talking in the corner that they are installed, whereas the same building has a strong echo when talking in the adjacent hallway where they are not installed. At this time there is a very significant door leak in the room I installed them in so it is difficult to fully assess the soundproofing effect, so take any less effectiveness in my review with a grain of salt. It did seem to dampen the sound well when placed under the laptop and I'd feel better about recording in this room now.

Excellent purchase. They are designed well and work as intended.

Used on hollow bedroom door and made noticeable difference.

Since I'm a musician, I soundproofed my room with those, and they are very dense and block the sound out very well. They are also great for sound treatment.

Excellent! Dense foam in smaller pieces that can be hung on walls. Feels similar to cardboard, easy to screw in hanging hardware, light enough for 3M hooks. The colour is available in natural beige which is pretty hard to find.