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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 $1.3M in April 2026, traded with 23 countries.
Importers of Woven Polyester Staple Fiber Fabric, Mixed Mainly with Cotton, Not Over 170 g/m² paid $237K in duties in April 2026 — an effective duty rate of 20% on $1.2M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataLightweight 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.
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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.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| HONDURAS | $1K | $968K | +$967K |
| MEXICO | $101K | $702K | +$602K |
| PAKISTAN | $475K | -- | -$475K |
| EL SALVADOR | $381K | -- | -$381K |
| CHINA | $176K | -- | -$176K |
Monthly import values over time