A carpet cushion that offers a firm yet elegant walk as maximum support for any carpet. An ideal product for use under Berber Carpets in a thickness no greater than 3/8 inch. Ruby ecxeeds the FHA requirements for Class II traffic, and the Carpet Cushion Council's recommendations for commercial installations with extra heavy traffic when installed in a thickness no greater than 3/8 inch. An excellent choice for the most discriminating buyer.