Classifying footwear: a worked walkthrough of HTSUS Chapter 64's material and construction test

Footwear is a deceptively simple-looking chapter that trips up candidates who classify by “type of shoe” instead of by the physical test the headings actually apply. Chapter 64 sorts footwear by outer sole material, upper material, and construction method, in that order of what the heading text asks about first. This walkthrough works four footwear scenarios and the footwear-parts heading.

The four-way material test

Reading the heading text for 6401 through 6405 in order shows the pattern directly:

• 6401: waterproof footwear with outer soles and uppers of rubber or plastics, where the upper is not fixed to the sole by stitching, riveting, nailing, screwing, plugging, or a similar process (think a molded rubber rain boot).
• 6402: other footwear with outer soles and uppers both of rubber or plastics.
• 6403: footwear with an outer sole of rubber, plastics, leather, or composition leather, and an upper of leather.
• 6404: footwear with an outer sole of rubber, plastics, leather, or composition leather, and an upper of textile materials.
• 6405: other footwear, the residual heading for combinations the four above do not cover.

The heading text is doing all the work. The outer sole material alone never decides the heading; the upper material is what separates 6402, 6403, and 6404 from each other, since all three allow a rubber or plastic (or leather) sole.

Scenario 1: a molded rubber rain boot, one piece, no stitching

The boot’s outer sole and upper are both rubber, molded as a single piece with no seam where the upper meets the sole. This matches 6401’s specific construction test: waterproof, sole and upper both rubber or plastics, and the upper is not attached by stitching or a similar mechanical process. Heading 6401 is written narrowly enough that GRI 1 resolves this directly from the text: it is not “any rubber boot,” it is specifically the ones assembled by molding or gluing rather than stitching.

Scenario 2: a canvas sneaker with a vulcanized rubber sole

The outer sole is rubber. The upper is woven cotton canvas. A candidate who classifies by “the sole is rubber, so it must be 6401 or 6402” has made the classic Chapter 64 error. Both 6401 and 6402 require the upper, not just the sole, to be rubber or plastics; this sneaker’s upper is textile. Heading 6404 is the one written for exactly this combination: “outer soles of rubber, plastics, leather or composition leather and uppers of textile materials.” The rubber sole is consistent with 6404’s text (which allows a rubber, plastic, leather, or composition-leather sole); it is the canvas upper that routes the shoe to 6404 instead of 6402.

Scenario 3: a leather dress shoe with a leather sole

Both the outer sole and the upper are leather. This is the most literal fit in the chapter: heading 6403 by its own text covers footwear with an outer sole of rubber, plastics, leather, or composition leather, and an upper of leather. GRI 1 resolves it without complication once the two materials are identified correctly.

Scenario 4: a box of unattached shoe uppers, shipped separately from soles

A manufacturer imports a container of stitched leather shoe uppers, not yet attached to any sole, destined for a domestic assembly line. These are not footwear yet; they are footwear components. Heading 6406 exists specifically for this: “parts of footwear (including uppers whether or not attached to soles other than outer soles); removable insoles, heel cushions and similar articles; gaiters, leggings and similar articles, and parts thereof.” An unattached upper is expressly covered by 6406’s own text (“uppers whether or not attached to soles other than outer soles”), so it does not need GRI 2(a) incomplete-article reasoning to reach a footwear classification; the parts heading already names it.

Where Additional U.S. Notes matter inside Chapter 64

Once GRI 1 has placed a shoe in the right four-digit heading, Chapter 64’s Additional U.S. Notes take over to route it to the correct eight- or ten-digit subheading, and several of the subheadings under 6403 and 6404 turn on defined construction terms rather than material alone, such as “welt footwear,” where the Notes supply the technical definition the exam expects a candidate to look up rather than guess at. Additional U.S. Notes are legally binding for classification purposes the same as Chapter Notes, but they are United States-specific rather than part of the internationally harmonized text, which is why a candidate must check them separately even after the heading is settled. See the Section, Chapter, and Additional U.S. Note walkthrough for how these three note types differ and how to apply each.

The pattern

Chapter 64 rewards reading the heading text for the specific pair of facts it asks about (outer sole material, upper material, and for 6401 specifically, the attachment method), in that order, rather than pattern-matching on “this looks like a sneaker” or “this looks like a boot.” All four scenarios above resolve at GRI 1 once the two materials are correctly identified.

For the underlying method, see the General Rules of Interpretation guide; for locating headings fast, use the chapter locator. For how classification fits the wider exam, see the customs broker exam guide and the study plan.

Sources: heading text for HTSUS headings 6401 through 6406 verified against the U.S. International Trade Commission's Harmonized Tariff Schedule (hts.usitc.gov), 2026-07-29. Additional U.S. Notes are described here at a summary level; confirm the current wording of Chapter 64's notes against the live HTSUS before relying on it.