Madeira Frosted Matt #40 is a true matte finish and light-fast polyester embroidery thread. Its vivid colors give it a high definition appearance that adds dimension and clarity to designs. Manufactured to be highly colorfast when exposed to sunlight for long periods of time, Frosted Matt has an unmatched overall rating for fastness to light, making it ideal for embroidered items that will be in direct sunlight, such as patio cushions and boat covers. Its polyester properties allow Frosted Matt to stand up to laundering with diluted bleach. It is Oeko-Tex® certified to be free from harmful substances.