【PREMIUM SERVICE】If you have any questions about our product, please feel free to contact us. Our customer service is always online to solve your issue within 24 hours. 【HIGH DENSITY & FIRE RETARDING MATERIAL】 Our products are made with high-density Acoustic Panels, effective to decreasing echoes and absorb noise with safety. We even use lighter to flame a pack of Acoustic Panels to convince that our product is inflaming retarding. 【SCIENTIFIC NOISE REDUCTION DESIGN】According to the insulation effect test, our products are effective to lower the noise and versatile for recording studios, home theaters, bedrooms, guitar rooms. The more acoustic foams you attach, the better effect you will get. 【1.5-INCH THICKNESS FOR SUPERB EXPERIENCE】1.5-inch thick soundproof foam product achieves the optimum sound absorption and reflection. Easy to shape and cut to wanted size, we are confident that our product would create a comfortable environment. 【DISTINCTIVE FEATURE】 Our acoustic foam panels feature with self-adhesive which is super convenient to install onto the wall. When you get our products, you would see that there is gum on its back which allows you extremely easily to install the Acoustic Panels.