StarBright is a blending nylon. It is a high luster tri-lobal nylon product that, although it doesn't have the luster level of Firestar, has far more luster than Snow Mountain. StarBright is a 3 Denier nylon. If we transfer Deniers to Microns, that would make StarBright a 19 micron nylon-so it's a much softer product than Firestar. The staple length is approximately 3 inches. Please enjoy this wonderful new addition to the blending nylon family!