5906.91 - Knitted or crocheted:

This HTS category, 5906.91, encompasses knitted or crocheted textile fabrics that have been impregnated, coated, covered, or laminated with rubber, where these fabrics are of a kind suitable for industrial use and are not classified under heading 5902. The defining characteristic here is the knit or crochet construction, distinguishing these fabrics from woven or non-woven textile materials that might also be rubberized. The "knitted or crocheted" aspect is crucial for accurate classification.

Within the broader "Other" designation for rubberized knitted or crocheted fabrics, this specific code, 5906.91, differentiates itself from its sibling category, 5906.99. While both fall under the "Other" umbrella for rubberized textile fabrics, 5906.91 specifically addresses the knitted or crocheted types, whereas 5906.99 would cover any other rubberized textile fabrics not fitting the criteria of 5906.91 or the more specific heading 5902.

The subcategories under 5906.91 further refine the classification based on the fiber content of the knitted or crocheted fabric. Goods are categorized as either "Of cotton" (5906.91.10.00) or further broken down into "Of man-made fibers" (5906.91.30.00). This distinction is vital for applying specific duty rates or trade regulations that may vary based on the origin of the textile material used in the rubberized fabric.