6111.90 - Of other textile materials:

Category 6111.90 encompasses babies' garments and clothing accessories that are knitted or crocheted, and importantly, are not made from cotton or synthetic fibers. This category serves as a catch-all for infant apparel meeting the general criteria of Chapter 61 but falling outside the more specific material classifications. Examples within this category would include items like baby onesies, sleepsuits, shirts, trousers, and outerwear crafted from materials such as wool, fine animal hair, silk, or artificial fibers.

Distinguishing 6111.90 from its siblings is crucial for accurate classification. HTS code 6111.20 specifically applies to babies' knitted or crocheted garments of cotton, while 6111.30 is reserved for those made of synthetic fibers. Therefore, if an infant garment is knitted or crocheted and its primary textile material is neither cotton nor a synthetic fiber, it will likely fall under the 6111.90 series.

Within 6111.90, further subdivisions exist to provide more granular classification based on the specific "other textile materials." This includes specific entries for garments made of wool or fine animal hair (6111.90.05), and for those containing a significant proportion of silk or silk waste (6111.90.70.00). The residual category, 6111.90.90.00, then covers all remaining items within the "of other textile materials" scope that are not otherwise specified by these more precise subheadings.