Classification Rule
Harmonized system regulations establish the methodology for classifying textile goods composed of two or more distinct fiber types. Within this global customs framework, Section XI Note 2a dictates that multi-fiber textile blends are classified under the heading that corresponds to the textile material that predominates by weight over any other single textile material. This rule provides a standardized approach to tariff determination for complex blended fabrics.
Weight Predominance
Classification applies to the primary fiber type when it constitutes the largest single fraction by weight. If a fabric contains forty percent wool, thirty-five percent polyester, and twenty-five percent acrylic, it is classified as a wool fabric because the wool portion outweighs each synthetic component individually.
Material Application
Importers use this rule to resolve classification disputes for garments made from ternary or quaternary fiber blends. Accurate weight calculations prevent misclassification and incorrect duty assessments at customs checkpoints.
Laboratory Analysis
Customs laboratories perform quantitative fiber analysis using chemical dissolution methods to verify the weight percentages declared on shipping documents. They weigh the sample before and after selective dissolution of each fiber component to calculate the precise blend ratio. This verification ensures full compliance with international tariff codes and prevents duty evasion.
