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SITCSection 6
U.S. imports of woven polyester staple fiber fabric, mixed mainly with cotton, not over 170 g/m² (SITC 65331) totaled $2.2M in July 2026, traded with 24 countries.
Importers of Woven Polyester Staple Fiber Fabric, Mixed Mainly with Cotton, Not Over 170 g/m² paid $420K in duties in July 2026 — an effective duty rate of 22% on $1.9M in dutiable value, based on actual customs collections rather than the published tariff schedule. Woven Polyester Staple Fiber Fabric, Mixed Mainly with Cotton, Not Over 170 g/m² imports of $2.2M in July 2026 ran 44% above the year-to-date monthly average of $1.5M.
Basic heading 65331 · $2.2M of $26.7B
Lightweight poly-cotton woven fabrics — where polyester staple fiber is below the 85% threshold, cotton is the dominant secondary fiber, and the fabric weighs no more than 170 g/m² — occupy this precisely bounded classification. The 170 g/m² ceiling is the key specification separating this heading from heavier poly-cotton constructions, and it aligns with the weight range typical of shirting, dress fabric, and lightweight workwear. Importers should note that both the blend ratio and the fabric weight must be confirmed by testing, as either parameter crossing its threshold shifts the classification. Section 301 tariff exposure is a practical concern for poly-cotton fabrics sourced from major Asian producing countries.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
120 shipments/mo
If polyester staple fiber reaches or exceeds 85% by weight, the fabric moves out of the blended-fabric category entirely and into SITC 65321 (woven polyester staple fiber fabric, ≥85%). The 'under 85%' threshold in SITC 65331 is a hard boundary — even a marginal difference in fiber content changes the applicable classification.
Fabric weight (grams per square meter, or GSM) is measured per standard textile test methods such as ASTM D3776 or ISO 3801, typically on conditioned fabric samples. There is no universal customs tolerance built into the classification — the stated weight of the fabric as tested determines which heading applies. Importers should obtain GSM test data from the mill and verify it against the 170 g/m² ceiling before filing the entry.
Supplier Network
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Imports · July 2026
origin
China and Pakistan together supply 45% of it.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$2.2MYoY · Pro
Exports
$2.6MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.