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U.S. imports of polyester staple fiber yarn mixed mainly with other fibers (nesoi), under 85% polyester, not for retail sale (HS 550959) totaled $238K in July 2026, traded with 9 countries.
Importers of Polyester Staple Fiber Yarn Mixed Mainly with Other Fibers (NESOI), Under 85% Polyester, Not for Retail Sale paid $59K in duties in July 2026 — an effective duty rate of 25% on $238K in dutiable value, based on actual customs collections rather than the published tariff schedule. Polyester Staple Fiber Yarn Mixed Mainly with Other Fibers (NESOI), Under 85% Polyester, Not for Retail Sale imports of $238K in July 2026 ran 18% below the year-to-date monthly average of $290K.
Last updated: July 2026 dataA residual catch-all for polyester-dominant blended staple yarns below 85% polyester by weight where the secondary fiber is neither artificial staple fiber, wool/fine animal hair, nor cotton — covering blends with fibers such as flax, jute, or other natural fibers not elsewhere specified. The single US tariff line is 5509590000. China leads US import supply for this heading, followed by Mexico and Canada. Because this is an NESOI (not elsewhere specified or included) category, importers must first confirm that the secondary fiber does not qualify the yarn for a more specific subheading before defaulting to 550959.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
8 shipments/mo
If the secondary fiber is not artificial staple fiber (viscose, modal, lyocell), wool, fine animal hair, or cotton, the yarn defaults to 550959. Examples include blends with flax, jute, ramie, or other natural fibers not covered by the specific subheadings. Importers should work through the subheadings in order — 550951 through 550953 — before concluding that 550959 applies.
Imports of synthetic staple fiber yarns from China may be subject to Section 301 tariffs, which apply in addition to the normal column 1 duty rate. Importers sourcing polyester-blend yarns from China under 550959 should confirm current Section 301 applicability and factor those additional costs into landed-cost calculations. Diversifying to Mexico or Canada — both also among the top suppliers — can reduce Section 301 exposure for qualifying goods under USMCA.
HSChapter 55
Subheading 7 of 18 in heading 5509
Subheading 550959 · $238K of $8.6M
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ImportsExports
Imports
$238KYoY · Pro
Exports
$55KYoY · Pro
12-mo low · imports
YoY · ProFewer than 6 of the last 12 months reported trade above $500K; the trend chart is not shown for thin series.
Through July 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 5509590000 | Yrn N Sw Td Sy St F N Rtl Sl Ot Yr Poly St F NESOI | $436K | 31.51% | 100.00% | $137K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 5509590000 | Yrn N Sw Td Sy St F N Rtl Sl Ot Yr Poly St F NESOI | $18K |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Imports · July 2026
origin
Korea, South and China together supply 87% of it.
customs district
destination
entry
rate provision · imports
the effective duty rate is 24.94%.