Product classification

HS code for Wet-blue swine leather: 4106.31

Tanned or crust hides and skins, of swine, without hair on, whether or not split, but not further prepared, in the wet state (including wet-blue).

Classification of wet-blue swine leather under HS 4106.31

Wet-blue swine leather is classified under HS code 4106.31. This classification is designated for the tanned or crust hides and skins of swine that are in a wet state and have not been further prepared. The Harmonized System separates leather based on the animal of origin, and swine (pig) skins are distinct from bovine or ovine skins. The "wet-blue" designation indicates that the skins have undergone chrome tanning, which prevents putrefaction and stabilizes the hide for long-term storage and shipping. To fall under 4106.31, the skins must be "without hair on" and must not have undergone any post-tanning processes such as dyeing, embossing, or coating. This code is essential for the global trade of pigskin, which is widely used in the footwear and garment industries due to its breathability and unique pore structure.

Covers
  • Wet-blue pig skins
  • Chrome-tanned swine hides in wet state
  • Wet-white tanned swine skins
  • Tanned swine skins, not split, in wet state
  • Split swine skins, tanned but not further prepared
Also under 4106.31
  • Timberland (for boot linings)
  • Wolverine (for work gloves)
  • Coach (for internal components)
  • Samsonite (for luggage linings)
  • various automotive suppliers (for seat backing)

Codes often confused with 4106.31

Common mistake. A common misclassification occurs with raw swine skins, which belong under HS code 4103.30. The distinction lies in whether the tanning process has commenced. Additionally, wet-blue swine leather is often confused with "crust" swine leather, which is classified under 4106.32; the difference is that crust leather is dry. If the swine leather has been finished or further prepared beyond the crust state, it moves to HS code 4113.10. It is also important not to confuse these with bovine leathers (Chapter 4104), as the grain pattern and biological origin are primary factors in HS classification.

4103.30Hides and skins; raw, of swine, (fresh or salted, dried, limed, pickled or otherwise preserved, but not tanned, parchment-dressed or further prepared), whether or not dehaired or split4106.32Tanned or crust hides and skins; of swine, without hair on, whether or not split, but not further prepared, in the dry state (crust)4113.10Leather; further prepared after tanning or crusting, including parchment-dressed leather, without hair on, whether or not split, other than leather of heading 41.14, of goats and kids41.04Tanned or crust hides and skins of bovine (including buffalo) or equine animals, without hair on, whether or not split, but not further prepared

Top exporters and importers of HS 410631 (the code used for wet-blue swine leather), 2025

In 2025, the largest exporter of HS 410631 (the code used for wet-blue swine leather) in UN Comtrade data was Thailand, with 63% of world exports; the largest importer in UN Comtrade data was China, with 82% of world imports. Vietnam did not report 2025 data, and its estimate from partner records misses its trade with other countries that did not report: in 2024 that was 26% of its imports here ($1.1M, CEPII BACI), so it may rank higher.

Figures cover everything classified under HS 410631, not only wet-blue swine leather.

Top exporters 2025 · share of world exports

  1. 1 Thailand $35M
  2. 2 Taiwan* ~$6.0M
  3. 3 Vietnam* ~$4.7M

World total: $55M Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 China $46M
  2. 2 Taiwan* ~$3.9M
  3. 3 Vietnam* ~$3.2M

Vietnam did not report 2025 data, and its estimate from partner records misses its trade with other countries that did not report: in 2024 that was 26% of its imports here ($1.1M, CEPII BACI), so it may rank higher.

World total: $57M 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. UN Comtrade records Taiwan as "Other Asia, not elsewhere specified". Saudi Arabia's exports under that code are left out: they are far too large to be trade with Taiwan, so mostly undisclosed partners. 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 codes for wet-blue swine leather

Brazil splits HS 4106.31 into 2 NCM codes. Pick the one that matches your product:

Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.

Questions about wet-blue swine leather

What is the HS code for Wet-blue swine leather?

The HS code for Wet-blue swine leather is 410631 (Tanned or crust hides and skins; of swine, without hair on, whether or not split, but not further prepared, in the wet state (including wet-blue)). The HS code for wet-blue swine leather is 4106.31, covering tanned swine skins in the wet state.

How do I classify Wet-blue swine leather for customs?

Wet-blue swine leather is classified under HS code 410631 — Tanned or crust hides and skins; of swine, without hair on, whether or not split, but not further prepared, in the wet state (including wet-blue). This is a 6-digit subheading level code.

Can wet-blue swine leather be imported with the hair still attached?

No, HS code 4106.31 specifically requires the skins to be "without hair on." Skins with hair would likely fall under raw hides or furskins in different chapters.

Which countries are the top exporters of wet-blue swine leather (HS 410631)?

In 2025, the top exporters of HS 410631 (the code used for wet-blue swine leather) in UN Comtrade data were Thailand ($35M, 63% of world exports), Taiwan (about $6.0M) and Vietnam (about $4.7M). World exports came to about $55M, 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 wet-blue swine leather (HS 410631)?

In 2025, the top importers of HS 410631 (the code used for wet-blue swine leather) in UN Comtrade data were China ($46M, 82% of world imports), Taiwan (about $3.9M) and Vietnam (about $3.2M). World imports came to about $57M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Vietnam did not report 2025 data, and its estimate from partner records misses its trade with other countries that did not report: in 2024 that was 26% of its imports here ($1.1M, CEPII BACI), so it may rank higher.

Is the HS code for Wet-blue swine leather the same in all countries?

The base HS code 410631 for Wet-blue swine leather 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 wet-blue swine leather in Brazil?

Brazil splits HS 410631 into 2 NCM codes, so the right one for wet-blue swine leather depends on the product's details: 4106.31.10 (Wet-blue pigskins, simply chrome-tanned), 4106.31.90 (Other wet-state pigskins).