How to Restore the Normal Size of the Acoustic Foam: 1. After opening the vacuum package, place the acoustic foam in a ventilated area for 12–24 hours; 2. Alternatively, soak the foam in water for 1 minute, wring it dry, then allow it to air dry or use a dry towel. High-Quality Materials: Sound-absorbing foam panels are crafted from fire-retardant and eco-friendly material, making them safe for use in small and medium-sized rooms. These high-quality panels provide effective sound absorption, reducing waves, reverb, and flutter echoes in smaller to medium-sized spaces. The principle of soundproofing foam is that sound waves are repeatedly reflected within the sponge structure, achieving noise reduction and sound absorption. The acoustic panels offer effective sound absorption characteristics and are safe for human contact. The high-quality studio foam maintains its sound insulation properties over time. For cleaning, simply vacuum or dust occasionally. Installation: It is recommended to apply adhesive tape to the four corners and center of the back of the acoustic foam panels before attaching them to the wall. Alternatively, you can use spray glue for installation based on your preference. Wide Application: These soundproofing foam squares offer a cost-effective solution for improving audio recordings at home or in a studio environment. Ideal for professional recording, video production, gaming live streams, and more. Suitable for use in professional studios, rehearsal rooms, concert spaces, podcasting, churches, home theaters, vocal booths, and residential spaces. Size: 30 x 30 x 2.5 cm Material: Polyurethane foam Color: White Package Contents: 12 x Sound-absorbing foam panels Note: Light and display settings may cause slight color variations between the image and the actual item. Measurement error is permitted within +/- 1–3 cm.