【Amazing Sound Absorption in 2" Thickness】The 2 Inch thick sound absorption foam provides greater overall absorption power and is effective in mid- and high-range frequencies. They are the best choice if you plan to use DIY acoustic panels to optimise your recording studio, home office, rehearsal space, home theatre, or vocal studio. If you need to cut a piece to a specific size or create custom angles and edges, you can do it without worrying about damaging an expensive piece of material. | 【With Flexible & Adjustable Designed】The soundproof foam is the best type to use for soundproofing because the design minimizes sound. It does this through its echo reduction method that occurs when noise reaches the cones.If you value versatility, acoustic foam may be your go-to option for soundproofing. Acoustic foam's smaller sizes mean you have more options with where to put each piece. You'll also have less difficulty moving them around if you ever need to adjust the layout of your space. | 【High Density & Non-toxic】The 4th-Gen polyurethane materials is non-toxic in high density which are bass traps ranging at a thickness of 230kgs/m3, are the thickest of all and a must-have for rooms with a subwoofer, bass amp, or drum kit. Made in non-toxic materials with strong fire resistance won't do harm to your body while everyday use. | 【Self-Adhesive, Easy to Use】You can feel confident soundproofing your space by yourself with easy-to-manage pieces of acoustic foam. No glue or tools required. The back of each board is already covered with glue, you just need to tear the kraft paper and stick it on the wall. (Please make sure to press each place on the block several times to make the sticking more firm.) | 【Easy Installation】 1. Vacuum compression packaged, restore to its real thickness by soaking in water for 10 munites, pressing the acoustic foam several times, squeezing out water, and then ventilating for 48-72 hours to dry. 2. Peel off self-adhesive back and stick to any clean surface easily