Yes. Knit fabrics containing elastomeric yarn (spandex/elastane) may be classified under specific HTS subheadings for fabrics containing rubber or elastomeric filaments, separate from non-elastic knit fabrics of the same fiber type. The percentage of elastomeric yarn by weight and the chief fiber content both factor into the correct subheading determination, so fiber blend certificates from the mill are essential.

Knit fabric lead times are sensitive to yarn availability (particularly for specialty fibers like modal, bamboo, or recycled polyester), dyehouse capacity in the country of manufacture, and minimum order quantities that vary significantly by mill. Seasonal demand spikes for activewear and swimwear fabrics can compress booking windows, making forward purchasing agreements or safety stock strategies important for brands with tight production calendars.