1) 100% merino wool underwear2) Micron: 17.5 20.53) Weight: 180 320gsm4) Fabric: rib, single jersey, interlock, terry5) Sewing: flatlockPacking: plastic bag 100% Merino wool, machine washable,won't hold odors like synthetics, extremelysoft, won't itch or irritate skin, natural stretch for a comfortable fit. We are specialized in producing and trading wool and cashmere products, Please give us your requirements in detail, we can make them as per your design.