EdMar 100% Rayon Embroidery Threads Thread Weights | Color Charts The luster and quality of EdMar rayon threads are unmatched for all types of hand needlework. These threads are colorfast and can even be machine washed. For details about stitching, washing and storing threads, please refer to our help menu EdMar Rayon Threads are manufactured in our facility in Meridian, Idaho. Our threads are spun from only the highest quality materials on spinning machines dedicated to a high level of spinning quality. The resulting threads are superior to any rayon hand embroidery threads on the market anywhere in the world today. The threads are hand dyed in over 200 color combinations, many with intricate color-changing variegations. The inimitable colors and styles of the EdMar line are what grab the attention of stitchers world-wide. The unsurpassed quality is what brings them back again and again. Although EdMar threads are primarily used in Brazilian style dimensional embroidery, it's uses in a wide range of needleworks are quickly being recognized. From cross-stitch to tassle-making, needle artists around the world are discovering the wonderful quality, color, smoothness, and sheen only EdMar threads deliver.