Product classification

HS code for Wet-blue pigskin: 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 pigskin under HS 4106.31

HS code 4106.31 is the specific tariff heading for swine or pig skins that have undergone the tanning process and remain in a wet state, commonly known as wet-blue pigskin. Pigskin is unique due to its follicle pattern and physical properties, requiring specific processing techniques compared to bovine or ovine hides. The wet-blue stage is a critical point in the supply chain, allowing for the long-distance transport of stabilized skins before they are converted into finished leather for linings, suede, or apparel. To qualify for this code, the skins must be free of hair and must not have been subjected to any finishing processes like embossing, coating, or dyeing. The classification is strictly for the wet state; once the pigskin is dried, it moves to a different subheading. This material is widely used in the production of work gloves and shoe interiors due to its breathability and abrasion resistance.

Covers
  • Wet-blue pigskins
  • Wet-blue hog skins
  • Chrome-tanned swine leather in wet state
  • Wet-blue pigskin splits
  • Pickled swine skins (if tanned)
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. Wet-blue pigskin is sometimes misclassified under HS code 4103.30, which is for raw pigskins that have not yet been tanned. It is also confused with HS code 4113.20, which covers pig leather that has been further prepared or finished. Additionally, if the pigskin is in the dry state (crust), it should be classified under 4106.32.

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 split4113.20Leather; 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 swine4106.32Tanned or crust hides and skins; of swine, without hair on, whether or not split, but not further prepared, in the dry state (crust)

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

In 2025, the largest exporter of HS 410631 (the code used for wet-blue pigskin) 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 pigskin.

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 pigskin

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 pigskin

What is the HS code for Wet-blue pigskin?

The HS code for Wet-blue pigskin 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 tanned or crust skins of swine in the wet state (wet-blue) is 4106.31.

How do I classify Wet-blue pigskin for customs?

Wet-blue pigskin 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.

Does 4106.31 include finished pig leather?

No, finished pig leather is classified under HS code 4113.20. Code 4106.31 is only for semi-processed wet leather.

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

In 2025, the top exporters of HS 410631 (the code used for wet-blue pigskin) 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 pigskin (HS 410631)?

In 2025, the top importers of HS 410631 (the code used for wet-blue pigskin) 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 pigskin the same in all countries?

The base HS code 410631 for Wet-blue pigskin 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 pigskin in Brazil?

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