6207.22.00.00 - Of man-made fibers (651)

This HTS category, 6207.22.00.00, specifically classifies men's and boys' nightshirts and pajamas that are exclusively manufactured from man-made fibers. This includes a wide array of synthetic and regenerated cellulosic fibers such as polyester, nylon, rayon, and acrylic. The key defining characteristic for classification within this sub-heading is the material composition; the garment must be primarily or entirely composed of these man-made textile materials.

This category is distinguished from its sibling, 6207.21.00, which covers identical types of nightwear but is specifically limited to those made of cotton. Therefore, if the nightshirt or pajama contains any cotton fibers, even in blends, it would fall under the cotton classification and not this man-made fiber designation. The other sibling, 6207.29, serves as a residual category for nightshirts and pajamas made from "other textile materials" not already specified, such as silk or linen.

As this is a leaf node within the HTS, there are no further subcategories. Classification here is determined solely by the garment type (nightshirt or pajama) and its composition of man-made fibers. Practical classification will involve verifying the textile content of the merchandise against the definitions of man-made fibers as established in international textile nomenclature.