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HSChapter 55
U.S. imports of polyester staple fiber yarn mixed mainly with cotton, under 85% polyester, not for retail sale (HS 550953) totaled $321K in April 2026, traded with 11 countries.
Importers of Polyester Staple Fiber Yarn Mixed Mainly with Cotton, Under 85% Polyester, Not for Retail Sale paid $18K in duties in April 2026 — an effective duty rate of 24% on $75K 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 $321K in April 2026 ran 15% below the year-to-date monthly average of $377K.
Last updated: April 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.
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.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| HONDURAS | -- | $17.6M | +$17.6M |
| DOMINICAN REPUBLIC | -- | $1.8M | +$1.8M |
| MEXICO | $152K | -- | -$152K |
| INDIA | $94K | -- | -$94K |
| INDONESIA | $73K | -- | -$73K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 5509530030 | YRN N SWG THD SYN STP FIB MX MNLY/SLY CT LT=52NM | $227K | 23.75% | $18K |
| 5509530060 | YRN N SW TD SY ST FB N RT SL YR PL GT 52NM | $94K | -- | -- |
YRN N SWG THD SYN STP FIB MX MNLY/SLY CT LT=52NM
YRN N SW TD SY ST FB N RT SL YR PL GT 52NM
HS10 export codes under this HS6 parent. 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 | $19.5M |
YRN N SW TH SYN ST FB N RT SL PLY S F MIX M/S COTN
7.5M kg
SYN STP FIB NT CRD, CMB OR PRSD SPNG, OF POLYESTER
HS 550320
ARTIF STP FIB NT CRD, CMB OR PRSD SPNG, VIS RAYON
HS 550410
YRN N SW TH MM ST FIB RT SL SYN STP FIB >=85% S FB
HS 551110
STPL FIB ARAMIDS NOT CARD/COMBD/PRCSD FOR SPINNING
HS 550311
SYN STP FIB NT CRD, CMB OR PRSD SPNG, ACRY/MODACRY
HS 550330
SYN STP FIB NOT CARD, CMB OR PRSD SPNG, NESOI
HS 550390
| State | Imports | Exports | Balance |
|---|---|---|---|
| North Carolina | $110K | $19.4M | +$19.3M |
| California | $96K | $48K | -$48K |
| Georgia | $115K | $14K | -$101K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| WILMINGTON, NC | -- | $13.3M | +$13.3M |
| PORT EVERGLADES, FL | -- | $3.0M | +$3.0M |
| MIAMI, FL | -- | $3.0M | +$3.0M |