6103.33 - Of synthetic fibers:

This HTS category, 6103.33, encompasses men's or boys' suit-type jackets and blazers that are knitted or crocheted and primarily composed of synthetic fibers. These garments are designed as part of a suit ensemble or as individual blazers intended for formal or semi-formal wear. The defining characteristic of this classification is the material composition, specifically requiring the garments to be made from synthetic fibers.

This category is distinguished from its siblings by its exclusive focus on synthetic fiber content. For instance, HTS code 6103.31.00.00 pertains to similar garments made of wool or fine animal hair, while 6103.32.00.00 covers those made from cotton. Any suit-type jackets or blazers of knitted or crocheted construction not meeting the synthetic fiber requirement would fall under the "Of other textile materials" category (6103.39) or its specific sub-classifications.

Within HTS 6103.33, further subcategories exist to refine the classification based on blended materials. The subcategory 6103.33.10.00 addresses garments containing a significant percentage (23% or more by weight) of wool or fine animal hair alongside synthetic fibers, indicating a blend where synthetic fibers still dominate but with a notable presence of animal hair. The remaining classifications fall under 6103.33.20.00, which covers all other suit-type jackets and blazers of synthetic fibers that do not meet the specific blend criteria of the preceding subcategory.