ITEM NAME:8 Pcs Sound Insulation Foam Acoustic Foam Sound Treatment Studio Room Absor L3A6 8 Pcs Sound Insulation Foam Acoustic Foam Sound Treatment Studio Room Absor L3A6 Each WEDGE comes uncompressed and in prime.Thin foam, over a large area, has less of a chance of distorted and muffling the sounds reverberation. The uniform wedge design help trap airborne noise while alleviating flutter echo and slap back.