Specifications include, but are not limited to: We request that these masks be constructed from previously unused material. No metallic fabric. Tightly woven 100% cotton fabric is required as the outer layer. Quilting cotton is excellent. A softer cotton such as flannel can be used as the inner layer if desired, but quilting cotton is also an acceptable inner layer. Synthetic materials are unacceptable as they do not breath well. Wash all fabric before cutting mask pieces to prevent masks from shrinking after construction. Masks are to be stitched not glued. Sizes to be Small: 7.5” x 5”, Medium: 9” x 6”, Large 10” x 7” These are the cut size not the finished size. When the mask is finished please indicate the size on the masks. Solid Colors are preferred. The mask are to have three pleats (accordion style).