A matrix-fibril fiber called "Source" is produced by Allied Chemicals Ltd. [22]. The fiber is based on PET fibrils embedded in a matrix of Nylon 6. The presence of PET fibrils is supposed to increase the modulus of the fiber, to reduce moisture regain, to reduce the dyeability, improve the texturing ability and give the fiber a unique lustrous appearance. The fine fibers produced by this method are used in synthetic leather, specialty wipes, ultra-high filtration media, artificial arteries and many other specialized applications.