6004 - Knitted or crocheted fabrics of a width exceeding 30 cm, containing by weight 5 percent or more of elastomeric yarn or rubber thread, other than those of heading 6001:

Heading 6004 encompasses knitted or crocheted fabrics with a width exceeding 30 centimeters that incorporate a significant amount of elastomeric yarn or rubber thread, specifically five percent or more by weight. This category is distinct from heading 6001, which covers pile fabrics and looped pile fabrics. The core defining characteristic of fabrics under 6004 is their inherent stretchability and recovery properties, derived from the presence of elastic components.

This classification is situated within Section XI (Textile and Textile Articles) and Chapter 60 (Knitted or crocheted fabrics), placing it within the broader group of fabrics produced through knitting or crocheting processes. Unlike its sibling categories which cover a wide array of raw materials and live animals, 6004 is specifically focused on finished textile fabrics with functional elasticity. The inclusion of elastomeric yarn or rubber thread is the primary criterion for classification here, differentiating these fabrics from standard knitted or crocheted materials.

Subdivisions within 6004 are determined by the specific elastic component present. Subheading 6004.10.00 applies to fabrics containing five percent or more of elastomeric yarn, but crucially, *without* any rubber thread. In contrast, subheading 6004.90 captures all "other" fabrics that meet the general criteria of heading 6004 but do not fall under 6004.10.00, which would include those containing rubber thread or a combination of both elastomeric yarn and rubber thread.