6203.31 - Of wool or fine animal hair:

This HTS category, 6203.31, specifically covers men's or boys' suit-type jackets and blazers that are constructed from wool or fine animal hair. This encompasses a range of garments designed for formal or business wear, distinct from casual outerwear, and is positioned within the broader classification for non-knitted or crocheted apparel. The defining characteristic for classification under this heading is the primary textile material.

Distinguishing this category from its siblings, 6203.32 covers similar suit-type jackets and blazers made of cotton, while 6203.33 applies to those fabricated from synthetic fibers. Category 6203.39 is for garments made from other textile materials not otherwise specified. Therefore, the presence of wool or fine animal hair as the principal component is the sole criterion for inclusion in 6203.31.

Within this category, further subdivision is provided to refine classification based on the specific type of wool fabric and its fiber characteristics. Subcategory 6203.31.50 is reserved for jackets and blazers made from worsted wool fabric, further specified by an average fiber diameter of 18.5 microns or less. The residual "Other" subcategory, 6203.31.90, accommodates all other suit-type jackets and blazers made of wool or fine animal hair that do not meet the specific criteria for 6203.31.50.