Product classification
HS code for Dyed synthetic warp knit: 6005.37
Fabrics, warp knit (including those made on galloon knitting machines), other than those of headings 60.01 to 60.04, of synthetic fibres, dyed.
Classification of dyed synthetic warp knit under HS 6005.37
Warp knit fabrics are classified under HS code 6005.37 when they are composed of synthetic fibers and have been dyed. Warp knitting is a specific manufacturing technique where the yarn zigzags along the length of the fabric, rather than following a single row as in weft knitting. This heading includes fabrics made on galloon knitting machines. Subheading 6005.37 is specific to synthetic fibers—such as polyester, polyamides, or acrylics—that are dyed. It excludes fabrics that are unbleached, bleached, or printed, which are covered by other subheadings like 6005.36 or 6005.38. This classification is vital for identifying technical textiles and specific apparel fabrics that utilize the stability and run-resistance characteristic of warp-knit structures. To be classified here, the fabric must not contain more than 5% elastomeric yarn or rubber thread, as those would move the classification to heading 6004. The "dyed" status requires the fabric to be of a single uniform color throughout.
- Covers
- Dyed polyester tricot fabrics
- Dyed nylon raschel knits
- Dyed synthetic mesh fabrics (warp-knit)
- Dyed galloon machine knitted fabrics
- Warp-knit athletic wear fabrics
- Also under 6005.37
- Lycra Sport fabric (solid colors)
- Under Armour HeatGear fabric (solid colors)
- Speedo swimwear fabric
- Carhartt workwear lining
- automotive headliner fabric from Lear Corporation
Codes often confused with 6005.37
Common mistake. The most frequent misclassification is with 6006.32, which covers weft-knit or circular-knit synthetic fabrics. Identifying the knit structure (warp vs. weft) is essential. Another common error is 6005.42, which is for dyed fabrics of artificial fibers rather than synthetic ones. Additionally, if the fabric has a pile surface, it should be classified under 6001. Finally, if the fabric is printed, it belongs in 6005.39.
Top exporters and importers of HS 600537 (the code used for dyed synthetic warp knit), 2025
In 2025, the largest exporter of HS 600537 (the code used for dyed synthetic warp knit) in UN Comtrade data was China, with 52% of world exports; the largest importer in UN Comtrade data was Vietnam, with about 25% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 600537, not only dyed synthetic warp knit.
Top exporters 2025 · share of world exports
- 1 China $1.1B 52% of world exports
- 2 South Korea $207M 9.8% of world exports
- 3 Japan $118M 5.6% of world exports
World total: $2.1B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Vietnam* ~$439M 25% of world imports · partner records ↗
- 2 Mexico $146M 8.3% of world imports
- 3 India $86M 4.9% of world imports
World total: $1.8B Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries marked * did not, so their figures add up what other countries recorded trading with them, and their exports are valued at buyers' CIF prices. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM code for dyed synthetic warp knit
Brazil classifies dyed synthetic warp knit under NCM 6005.37.00: HS 6005.37 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about dyed synthetic warp knit
What is the HS code for Dyed synthetic warp knit?
The HS code for Dyed synthetic warp knit is 600537 (Fabrics; warp knit (including those made on galloon knitting machines), other than those of headings 60.01 to 60.04, of synthetic fibres, dyed). The HS code is 6005.37 for dyed warp-knitted fabrics made of synthetic fibers.
How do I classify Dyed synthetic warp knit for customs?
Dyed synthetic warp knit is classified under HS code 600537 — Fabrics; warp knit (including those made on galloon knitting machines), other than those of headings 60.01 to 60.04, of synthetic fibres, dyed. This is a 6-digit subheading level code.
How do I identify a warp knit fabric?
Warp knits typically have vertical loops and are more resistant to runs and ladders compared to weft (circular) knits.
Which countries are the top exporters of dyed synthetic warp knit (HS 600537)?
In 2025, the top exporters of HS 600537 (the code used for dyed synthetic warp knit) in UN Comtrade data were China ($1.1B, 52% of world exports), South Korea ($207M) and Japan ($118M). World exports came to about $2.1B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of dyed synthetic warp knit (HS 600537)?
In 2025, the top importers of HS 600537 (the code used for dyed synthetic warp knit) in UN Comtrade data were Vietnam (about $439M, 25% of world imports), Mexico ($146M) and India ($86M). World imports came to about $1.8B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Is the HS code for Dyed synthetic warp knit the same in all countries?
The base HS code 600537 for Dyed synthetic warp knit is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for dyed synthetic warp knit in Brazil?
In Brazil, dyed synthetic warp knit (HS 600537) is classified under NCM 6005.37.00.