... its own garment factory which is specialized in merino wool underwear, sportswear and all kinds of knitted garment 100% ... superfine men merino wool long johns pantsMicron: 17.5~20.5Weight: 180~320gsmFabric ... layer, fleece etcSeam: flatlock, overlock etcPacking: plastic bag100% Merino wool, machine washable, won't hold odors like synthetics, extremely soft ...