6003.30 - Of synthetic fibers:

Heading 6003.30 specifically classifies knitted or crocheted fabrics of synthetic fibers that do not exceed 30 cm in width, excluding those covered under headings 6001 and 6002. This category encompasses a wide array of fabrics produced through knitting or crocheting processes, where the primary constituent fiber is synthetic in nature, such as polyester, nylon, acrylic, or spandex. These fabrics are characterized by their specific width limitation and are distinct from fabrics made from natural fibers.

This heading differentiates itself from its siblings based on material composition. While 6003.10 covers fabrics of wool or fine animal hair, and 6003.20 pertains to cotton fabrics, 6003.30 is exclusively for those manufactured from synthetic fibers. Similarly, 6003.40 deals with artificial fibers, which are derived from natural sources but processed into fibers, whereas synthetic fibers are entirely man-made. The "Other" category (6003.90) serves as a residual for knitted or crocheted fabrics within the specified width that do not fit into the preceding material-based classifications.

Within 6003.30, further subdivisions distinguish between open-work warp knit fabrics and other types. The subcategory 6003.30.10.00 captures those specifically designed with deliberate openings or gaps, often achieved through a warp knitting technique. The remaining fabrics within this synthetic fiber category, which do not meet the specific criteria for open-work warp knits, are classified under 6003.30.60.00. This structured breakdown allows for precise classification based on both material and construction details.