1.rubber covered yarn 2.rubber is malysia rubber, 3. we can do 90#/75d/2, 63#/75d/2,110/75d/2 ... for socks 4.best quanlity rubber covered yarn:63# rubber bare covered 200dX2 polyester75# rubber bare covered 150dX2 polyester90# rubber bare covered 75dX2 polyester100# rubber bare covered 75dX2 polyestergood quanlity, latex from malaysia, raw white and colors for socks 90# elastic yarn