5106 - Yarn of carded wool, not put up for retail sale:

This HTS category, 5106, specifically covers yarns made from carded wool, intended for industrial or manufacturing purposes and not packaged for direct sale to consumers. Carding is a mechanical process that aligns wool fibers into a sliver, preparing them for spinning into yarn. This classification is distinct from raw wool (Chapter 51) which is unsorted and uncarded, and from fully processed or finished wool fabrics (Section XI). It also differs from yarns put up for retail sale, which are classified elsewhere.

Within this category, the primary distinction lies in the wool content. Subcategory 5106.10.00 encompasses yarns where wool constitutes 85 percent or more of the total weight, signifying a predominantly wool composition. Conversely, subcategory 5106.20.00.00 deals with yarns containing less than 85 percent wool, indicating the presence of other fibers blended with wool. These subcategories provide crucial granularity for trade statistics and duty assessment based on the precise material composition of the wool yarn.