170 gsm; 17.5 micron; single layer, jersey knit Merino wool fabric Naturally occurring benefits such as odor control, UV protection and moisture management to wick perspiration Tagless labeling, non-itch waistband; comfortable fit; sits 1" below natural waistline Naturally occurring moisture management wicks perspiration and dries quickly Best used as a base layer or a single layer in cold to very cold weather and medium to high activity