A minimum 85% nylon or polyamide filament content by weight is the defining threshold for SITC 65314, separating these fabrics from blended manmade constructions where polyamide is a minority fiber. Nylon-dominant woven fabrics at this concentration level are commercially significant in activewear, swimwear linings, hosiery base cloth, and lightweight outerwear, where the fiber's elasticity, abrasion resistance, and moisture-wicking properties are primary selection criteria. Pile, chenille, narrow, and special fabric constructions are excluded from this heading, as are fabrics made from high-tenacity nylon yarn (which fall under SITC 65311). Section 301 tariffs have affected imports of certain synthetic woven fabrics from China, making origin and fiber-content documentation critical for this category.

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