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HSChapter 55
U.S. exports of polyester staple fiber yarn mixed mainly with cotton, under 85% polyester, not for retail sale (HS 550953) totaled $15.6M in July 2026.
Importers of Polyester Staple Fiber Yarn Mixed Mainly with Cotton, Under 85% Polyester, Not for Retail Sale paid $22K in duties in July 2026 — an effective duty rate of 23% on $94K in dutiable value, based on actual customs collections rather than the published tariff schedule. Polyester Staple Fiber Yarn Mixed Mainly with Cotton, Under 85% Polyester, Not for Retail Sale imports of $190K in July 2026 ran 54% below the year-to-date monthly average of $412K.
Last updated: July 2026 dataPolyester-cotton blended staple yarns — where polyester is the dominant synthetic fiber at below 85% by weight and cotton is the primary secondary fiber — are among the most commercially significant blended yarn categories, feeding denim, shirting, and workwear fabric production. Three US tariff lines apply: 5509530000 (general), 5509530030 (yarn ≤52 metric number), and 5509530060 (yarn >52 metric number), with the metric number (Nm) breakpoint distinguishing coarser from finer counts. Mexico leads US import supply, followed by Indonesia and India. The Nm threshold is a critical classification fact that must be confirmed from the manufacturer's technical data sheet.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
10 shipments/mo
Metric number (Nm) is a yarn count system expressing the number of 1,000-meter lengths per kilogram — higher Nm means finer yarn. The US tariff schedule splits polyester-cotton blended yarn at 52 Nm: yarns at or below 52 Nm (coarser counts, used in denim and heavy fabrics) fall under 5509530030, while yarns above 52 Nm (finer counts, used in shirting and lighter fabrics) fall under 5509530060. The Nm value should be confirmed from the mill's technical specification sheet before filing entry.
Yes. If the cotton content by weight exceeds the polyester content — meaning cotton is the predominant fiber rather than polyester — the yarn would be classified under Chapter 52 (cotton yarn headings) rather than Chapter 55. The 'polyester mixed mainly with cotton' language in 550953 presupposes that polyester is still the dominant fiber. Fiber composition documentation is essential to confirm which fiber governs classification.
Subheading 9 of 18 in heading 5509
Subheading 550953 · $190K of $6.6M
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ImportsExports
Imports
$190KYoY · Pro
Exports
$15.6MYoY · Pro
12-mo low · imports
YoY · ProThrough 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 |
|---|---|---|---|---|---|
| 5509530030 | Yrn N Swg Thd Syn Stp Fib Mx Mnly/Sly Ct Lt=52nm | $164K | 9.59% | 41.13% | $16K |
| 5509530060 | Yrn N Sw Td Sy St Fb N Rt Sl Yr Pl Gt 52nm | $26K | 23.20% | 100.00% | $6K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 5509530000 | Yrn N Sw Th Syn St Fb N Rt Sl Ply S F Mix M/S Cotn | $15.6M |
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.
Exports · July 2026
destination
Honduras and Dominican Republic together take 99% of it.
customs district
origin
entry
rate provision · imports
50.7% enters free of duty; the effective duty rate is 11.47%.