2-1/2" x 72" x 80" Charcoal Acoustic Studio Eggcrate Foam 40 sq. ft. by Soundproof Store Pack of 1 Sheet. Covers 40 sq. ft. For those who want the increased sound-deadening qualities of 2 inch wedge foam. Performs well for someone needing soundproofing on a budget. Performs well for someone needing soundproofing on a budget. Overall NRC: 0.60