Yarn must be presented in a form — such as balls, skeins, or cones with consumer labeling — that indicates it is intended for direct sale to the general public. Industrial spools or cones without retail presentation typically classify under the bulk filament yarn headings rather than here.

Yes. The heading applies to man-made filament yarn broadly, encompassing both synthetic types (such as polyester or nylon) and artificial types (such as viscose rayon), provided the yarn is put up for retail sale and is not sewing thread.