6109.90.15 - Of wool, with long sleeves

This HTS category, 6109.90.15, specifically classifies knitted or crocheted T-shirts, singlets, tank tops, and similar garments that are made from wool and feature long sleeves. The "other textile materials" parent category indicates that these garments are not primarily composed of man-made fibers, silk, or silk waste.

This classification is distinct from its siblings. 6109.90.10 covers similar garments made of man-made fibers, while 6109.90.40 is reserved for items containing 70 percent or more by weight of silk or silk waste. 6109.90.80 serves as a residual category for other textile materials not falling under the more specific designations. The defining characteristics here are the use of wool and the presence of long sleeves, differentiating it from simpler sleeveless or short-sleeved garments.

The subcategories within 6109.90.15 further refine the classification based on gender. Items are divided into "Men's or boys'" and "Women's or girls'," allowing for a more precise designation for import and export purposes. This distinction is crucial for accurate duty assessment and statistical reporting in international trade.