Most of the Merino wool available to handspinner's and felter's is rated at 64's (about 22 micron). . . it's soft, but THIS is very, very special!
The 15.5 micron Super 150's merino may be one of the world's most perfect fibers, having all of the great properties of wool with the fineness of cashmere. This wool is naturally 15.5 microns, this is not a coarser merino stretched to be finer.