Harmonized System
U.S. imports of Polyester Staple Fiber Yarn Mixed Mainly with Other Fibers (NESOI), Under 85% Polyester, Not for Retail Sale (HS 550959) totaled $279K in August 2026, imported from 9 countries.
Importers of Polyester Staple Fiber Yarn Mixed Mainly with Other Fibers (NESOI), Under 85% Polyester, Not for Retail Sale paid $101K in duties in August 2026, an average duty rate of 36.16% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 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 import shipments a month
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.
Subheading 9 of 18 in heading 5509
Subheading 550959 · $279K of $10.0M
Trade Directory
List your company under HS 550959 — Polyester Staple Fiber Yarn Mixed Mainly with Other Fibers (NESOI), Under 85% Polyester, Not for Retail Sale, so the companies trading it can find you. Be the first supplier listed.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 5509590000 | Yrn N Sw Td Sy St F N Rtl Sl Ot Yr Poly St F NESOI | $279K | 36.16% | 81.70% | $101K |
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 | $23K |
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.
ImportsExports
Imports
$279KYoY · free account
Exports
$23KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $4.3M of Polyester Staple Fiber Yarn Mixed Mainly with Other Fibers (NESOI), Under 85% Polyester, Not for Retail Sale and exported $279K.
Fewer than 6 of the last 12 months reported trade, or the latest month was under $500K; the trend chart is not shown for thin series.
Through August 2026. Source: U.S. Census Bureau.
Imports · August 2026
origin
China and India together supply 82% of it. China pays 50.7% duty; Canada 0.5%.
customs district
destination
entry
rate provision · imports
18.3% enters free of duty; duty collected equals 36.16% of imports for consumption.