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 90#rubber covered 75d polyester/2 ,available for make socks medical product rubber covered yarn, rubber is malysia rubber, we can do 90#/75d/2, 63#/75d/2,110/75d/2 ... for socks