1.100% merino wool 2.1*1rib, 190-250gsm, 18~21mic 3. artworks: 4 needls and 6 threads features ... s requirements. Main merino wool fabric we use: MaterialConstructionWeight Fineness100% Merino Wool S/J120gsm17.5micron100% Merino Wool S/J180gsm18.5micron100% ... WoolInterlock250-280gsm19.5micron main products we supply:100% merino wool , wool blended, cashmere, cotton, modal, soybean,bamboo underwear set ...