Both headings cover narrow knitted or crocheted fabrics not exceeding 30 cm wide, but 6002 applies specifically when the fabric contains 5% or more by weight of elastomeric yarn or rubber thread. Fabrics below that elastomeric threshold—or containing no elastomeric content—fall under 6003, which is organized by fiber type. Accurate fiber and elastomeric content analysis is essential to distinguish the two.

Subheading 600240 covers fabrics with 5% or more elastomeric yarn (such as spandex/Lycra) but no rubber thread, while 600290 is the residual for other qualifying fabrics, including those containing rubber thread. Elastomeric yarn is a synthetic filament with high stretch recovery, whereas rubber thread is a core of natural or synthetic rubber. Identifying which stretch element is present determines the correct subheading.