If the elastomeric yarn content reaches 5% or more by weight, the fabric falls under 6002 regardless of the other fiber content. Below that 5% threshold, the fabric is classified under 6003 by its predominant fiber type—in this case, synthetic fibers under 600330. Precise weight-percentage analysis of the elastomeric component is the deciding step.

For tubular knitted fabrics, the width is measured in the flattened state. For fabrics that are folded or gathered, CBP generally measures the width as it would be when laid flat and unfolded. If a fabric is designed to be used at a width exceeding 30 cm but is presented folded, classification may follow the actual use width rather than the folded presentation—a binding ruling is advisable for borderline cases.