These "soundproof panels" don't block any sound, not even 1db, which is unbelievable even for these... It's a waste of money unfortunately, and obviously I'm not satisfied with the result!! I would be if I got my money back but since I know that will never happen, my opinion will not change no matter what!!

It's not of any crazy quality, it's more suitable for decoration and besides that, the foam takes a very long time to return to its normal shape...

when you take them out of the box they have a very unpleasant smell. I left them outside for days and they still don't stop smelling. I put them in my room and the smell started to give me a headache and I couldn't sleep in the room. DO NOT BUY.

I got a piece to record the sound of the motorcycle. I wrap the microphone inside it and put it in the backpack. It cuts out unwanted sounds from the wind.

I tried the two-tone black and gray of the same brand since I saw it from someone in the reviews. They look very high quality, decompressed quickly, and overall they are as I expected.

Very good material. It takes 2-3 days to recover from the pressure in the package. The soundproofing result is quite good.

They are quite thick and decompressed right away. I got the black ones but also a pack of 25 gray ones from this company. In terms of appearance, the photos speak for themselves! Practically, I am very satisfied, especially considering their price. They were placed in a semi-professional recording studio, and both the echo and external noise were significantly reduced. I will definitely return with a new order for black ones as well as gray ones since the two-tone matched perfectly with my space.

I am a third-year violin student and next year I will take exams to get my diploma. Due to the difficulty of the pieces and their volume, I am forced to practice several hours a day, resulting in me being heard throughout the entire apartment building. However, since I got these soundproofing materials and set up something like a little studio, the sound has significantly decreased to the point where a neighbor caught me and asked if I am still playing the violin or if I have given it up. This is also the reason I am leaving this review. I highly recommend them!