Auralex Acoustics SonoLite Acoustic Absorption Foam, 1" x 24" x 24", 2-Panels, Black Fabric wrapped Studio foam with rigid backing. Absorbs mid/high frequency reflections to control the ambience of any room. Alleviates flutter echo and slap back Velour fabric wrap for a more finished, svelte look than traditional Studio foam Easily installed to finished walls with EZ-Stick Tabs without causing any damage or visible blemishes when removed. NRC = 0.80