32 X 40 Crescent RagMat Board 25 pack

Made of strong cotton fibers, which are naturally acid-free and lignin-free Cotton is time-tested and naturally free of any chemicals that could harm artwork. Cotton is annually renewable and environmentally friendly RagMat meets museum conservation standards as set by F.A.C.T.S. and F.A.T.G. Cotton RagMat is the only matboard guaranteed safe next to any artwork.