4202.12.89.10 - Containing 85 percent or more by weight of silk or silk waste

This classification applies to attache cases, briefcases, school satchels, occupational luggage cases, and similar containers specifically designed for carrying work-related or educational materials. These items are characterized by having an outer surface composed of textile materials.

The distinction between this category and its siblings lies in the specific material composition of the outer surface. While 4202.12.89.20 is designated for cases with an outer surface of cotton, this category is broader, encompassing textile materials beyond cotton. The "Other" sibling category (4202.12.89.40) would capture textile-covered cases not otherwise specified.

As a leaf node, this classification does not have further subcategories. Therefore, the determination of classification within this code rests solely on whether the item is an attache case, briefcase, school satchel, occupational luggage case, or a similar container, and its outer surface is made of textile materials (excluding cotton, which is classified separately). The crucial determinant is the presence of textile material in the outer covering, differentiating it from cases with plastic or other types of outer surfaces.