Harmonized System
U.S. imports of knitted or crocheted fabrics of synthetic fibers, unbleached or bleached (HS 600631) totaled $4.1M in August 2026, imported from 36 countries.
Importers of Knitted or Crocheted Fabrics of Synthetic Fibers, Unbleached or Bleached paid $958K in duties in August 2026, an effective tariff rate of 23.19% of the $4.1M imported — duty actually collected as a share of that value, not the published tariff schedule. Knitted or Crocheted Fabrics of Synthetic Fibers, Unbleached or Bleached imports of $4.1M in August 2026 ran 50% above the year-to-date monthly average of $2.8M.
Last updated: August 2026 dataUnbleached and bleached knitted or crocheted fabrics composed of synthetic fibers — primarily nylon and polyester — are widely traded inputs for apparel, activewear, and technical textile manufacturing. The US schedule breaks this heading into five 10-digit lines (6006310000 through 6006310080), distinguishing double-knit/interlock constructions in nylon (6006310020) and polyester (6006310040) from other knit configurations. China is the dominant supplier, with Canada and India also contributing meaningfully to US import volumes. Importers should note that synthetic knit fabrics from China may be subject to Section 301 tariffs, making origin documentation and tariff engineering particularly important for sourcing decisions.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
349 shipments/mo
The schedule separates nylon double-knit/interlock constructions (6006310020) from polyester double-knit (6006310040) and other synthetic double-knit fabrics (6006310060), with a catch-all line (6006310080) for other unbleached/bleached synthetic knit constructions. Correct classification depends on fiber content and knit structure, so importers should verify both when preparing entry documentation.
Yes. Knitted synthetic fabrics originating in China are generally subject to Section 301 tariffs. Importers sourcing from China should confirm the applicable list and rate with a licensed customs broker, as the measures have been subject to ongoing review and modification.
HSChapter 60
Trade Directory
List your company under HS 600631 — Knitted or Crocheted Fabrics of Synthetic Fibers, Unbleached or Bleached, so the companies trading it can find you. Be the first supplier listed.
Subheading 4 of 14 in heading 6006
Subheading 600631 · $4.1M of $22.4M
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 |
|---|---|---|---|---|---|
| 6006310040 | Polyester, Dbl Knit, Unblch/Blch Synth Fibers, Knt | $1.9M | 25.87% | 76.36% | $497K |
| 6006310080 | Other Unblchd/Blchd Synth Fibers, Knit, NESOI | $1.7M | 23.46% | 92.41% | $400K |
| 6006310060 | Other Unblchd/Blchd Synth Fibs, Dbl Knit, NESOI | $429K | 9.67% | 62.49% | $41K |
| 6006310020 | Nylon, Blchd/Unblchd, Dbl Knt/Intrlck Const Knit | $78K | 25.77% | 116.44% | $20K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 6006310000 | Oth Knit/Crochet Fab of Unblch/Blch Synthtic Fiber | $3.5M |
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
$4.1MYoY · free account
Exports
$3.5MYoY · free account
12-mo low · imports
YoY · free accountOver the twelve months to August 2026, the U.S. imported $32.8M of Knitted or Crocheted Fabrics of Synthetic Fibers, Unbleached or Bleached.
Through August 2026. Source: U.S. Census Bureau.
Imports · August 2026
origin
China and India together supply 62% of it. China pays 46.2% duty; Canada 0.0%.
customs district
destination
entry
rate provision · imports
12.8% enters free of duty; duty collected equals 23.19% of total import value.