Flammable Fabrics Act Clothing Requirements
What does the Flammable Fabrics Act require for clothing?
Under the Flammable Fabrics Act, clothing textiles have to meet the CPSC's Standard for the Flammability of Clothing Textiles (16 CFR Part 1610). Fabric and garments are tested and put into one of three flammability classes. Class 3 ("rapid and intense burning") is dangerously flammable and "shall not be used for clothing" [1]. Sections 3 and 4 of the Act prohibit making such items for sale, importing them into the United States, or introducing them into commerce [2].
Approach: I read the current eCFR text of 16 CFR Parts 1610, 1611, 1615 and 1616 (the CPSC flammability standards issued under the Act). The text of the Act itself (15 U.S.C. 1191 and following) is cited here only as Part 1610 describes it.
Scope (Part 1610)
- What it covers: fabric or related material "in a form or state ready for use in an article of wearing apparel, including garments and costumes finished for consumer use" [3].
- What it excludes:
- Excluded fabric still has paperwork conditions. Fabric sold for interlinings, or for the excluded hats, gloves and footwear, is outside section 3 of the Act only if an invoice or other paper states the intended end use. If the fabric is dangerously flammable, records of acquisition, disposition and end use must also be kept [8][9].
- Handkerchiefs no larger than 24 inches on any side, or no more than 576 square inches in area, are not articles of wearing apparel. They are covered if they are attached to, or sold as part of, a garment [10][11].
The test
- Every textile is tested twice: as sold, and again after refurbishing (cleaning) [12].
- The specimen is held at 45° and a flame is applied for 1 second. The lab records how long the flame takes to travel 127 mm (5 in), and whether the base of a raised-surface fabric ignites or fuses [13].
- Only the uncovered or exposed part of a garment is tested [14].
- A raised-fiber inner side counts as exposed if the garment can be worn inside out. Sweatshirts are the example the rule gives [15].
Flammability classes (§1610.4)
| Class | Plain surface fabric | Raised surface fabric | Use in clothing |
|---|---|---|---|
| 1, Normal | Burn time 3.5 s or more | Burn time more than 7.0 s, or a surface flash (0.0-7.0 s) too weak to ignite or fuse the base fabric | Acceptable |
| 2, Intermediate | Not applicable | 4.0 to 7.0 s inclusive, and the base fabric burns (code SFBB) | "may be used" |
| 3, Rapid and intense | Less than 3.5 s | Less than 4.0 s, and the base fabric burns (SFBB) | "shall not be used" |
Sources for the table: [16][17][18][19][20]
Fabrics that need no testing to support a guaranty
Firms issuing an initial guaranty do not need tests to support it for:
- plain surface fabrics weighing 2.6 oz per square yard or more, whatever the fiber [21];
- any fabric of any weight made entirely from acrylic, modacrylic, nylon, olefin, polyester or wool, or a blend of only these fibers [22].
Special cases
- Fabric not normally washed or dry cleaned (bridal illusion is the example given) can skip refurbishing before testing. In that case it must be marked: "Fabric may be dangerously flammable if dry cleaned or washed." [23]
- Disposable fabrics and garments are not refurbished before testing and do not need that label [24].
- Film and coatings:
- Children's sleepwear has its own standards. Part 1616 covers sizes 7 through 14 and replaces Parts 1610 and 1611 for those items [28][29]. Part 1615 (FF 3-71) covers sizes 0 through 6X [30].
Guaranties and records
- What a guaranty does: a guaranty received in good faith protects the holder from criminal prosecution under section 7 of the Act. It is no defense to cease-and-desist proceedings, injunctions or seizures [31].
- Testing behind it: anyone issuing an initial guaranty "shall devise and implement a program of reasonable and representative tests," meaning at least one test showing conformance. The issuer decides how many tests to run and how often [32][33].
- Records to keep:
- Alternate test methods can support a guaranty only if they are as stringent as, or more stringent than, the Part 1610 test. The firm must hold data showing this before it uses the method [37][38].
- Shipping or importing for flame-retardant treatment:
Which fabrics are exempt from testing?
Under 16 CFR Part 1610, two types of fabric are exempt, and only from testing to support a guaranty. §1610.1(d) says firms issuing an initial guaranty for these fabrics, or for products made entirely from them, "are exempt from any requirement for testing to support guaranties of those fabrics" [43]:
- Heavier plain surface fabrics: plain surface fabrics of any fiber content weighing 2.6 ounces per square yard or more [21].
- Certain synthetic and wool fabrics: any plain or raised-fiber surface fabric, of any weight, made entirely from acrylic, modacrylic, nylon, olefin, polyester or wool, or a blend of only these fibers [22].
The rule gives the reason: years of testing show these fabrics "consistently yield acceptable results" [43].
Approach: I read the current eCFR text of the CPSC flammability standards (16 CFR Part 1610, including the §1610.61 enforcement statement).
What the exemption covers
- It does not make Class 3 fabric legal. Class 3 textiles still "may not be used in clothing" [44].
- A guaranty still needs a basis. It "must be based on the exempted types of fabrics or on reasonable and representative tests" [45].
- Check the exemption first. The CPSC says a guarantor should first check whether the fabric qualifies under §1610.1(d). If no exemption applies, the guarantor "must devise and implement a program of reasonable and representative tests," with at least one test required [45].
- Advice for buyers. The CPSC suggests buying fabrics or garments that meet the §1610.1(d) exemptions. Buyers who can't tell whether a fabric qualifies are told to hire a textile consultant or test lab [46].
- Non-exempt fabrics: test them before cutting and sewing [47].
Other items that are not tested, or are exempt with conditions
- Narrow fabrics and loose fibrous materials: if they are made less than 50 mm (2 in) wide in either direction, they "shall not be tested." If a 50 mm × 150 mm specimen can't be cut, no test is run. The rule's examples are hula skirts, leis, fringe, loose feathers, wigs and hairpieces [48].
- Outer layer of disposable diapers: plastic film or plastic-coated fabric used for it is exempt from the Standard, but only if a full-thickness sample of the assembled article passes the test that would otherwise apply (Part 1610 or Part 1611), with the flame applied to the exposed surface [49][50].
- Disposable fabrics and garments: these are still tested. They skip only the step of cleaning before testing, and they don't need the related label [24].
The items excluded from the Standard's scope (hats that don't cover the neck, face or shoulders; gloves up to 14 in; certain footwear; interlinings; small handkerchiefs) were covered in my previous answer. They are outside the Standard's scope, which is different from a testing exemption.
What must clothing importers certify?
A clothing importer has to issue a certificate of compliance for each finished garment it imports. The certificate states that the garment meets every CPSC rule that applies to it, which for apparel means the 16 CFR Part 1610 flammability standard. The statute puts this on the "manufacturer," and the Consumer Product Safety Act defines that as "any person who manufactures or imports a consumer product" [51]. For foreign-made goods, CPSC's certificate rule makes the importer of record the party that "must issue" the certificate (16 CFR 1110.7(a)), and imported certificates must be filed electronically with CBP.
Approach: I read the Consumer Product Safety Act (2023 U.S. Code edition: §§2052, 2063, 2066, 2068) and the current eCFR flammability standards (Parts 1610, 1611, 1615, 1616) in the datasets. The certificate rule itself, 16 CFR Part 1110 (as rewritten at 90 FR 1843, Jan. 8, 2025), is not in the datasets, so I read it on the official eCFR.
Which certificate
- General Certificate of Conformity (GCC), for adult apparel. It "shall certify, based on a test of each product or upon a reasonable testing program," that the product complies with all applicable rules. It "shall specify each such rule" [52]. For clothing, Part 1610 sets the standard, and Class 3 fabric "shall not be used for clothing" [1].
- Children's Product Certificate (CPC), for children's clothing subject to a children's product safety rule.
- Before importing, the importer "shall" send samples to an accredited third-party lab and certify based on that testing [52].
- Children's sleepwear also falls under Parts 1615 and 1616. Those standards require every "manufacturer, importer, and other person" introducing the items to group them into production units and test samples from each unit [53][54]. They also require continuity records [55].
- Each garment must carry a production unit identification [56].
- Children's products must also carry permanent tracking marks on the product and its packaging "to the extent practicable" [52].
What the certificate must contain (16 CFR 1110.11)
- Product identity: at least one unique identifier (GTIN, model number, registered number, serial number, SKU, UPC or an alternate identifier), plus a description detailed enough to match the garment to the certificate.
- Each applicable rule, listed separately.
- The certifier: name, street address, city, state or province, country, email and telephone.
- The records custodian: the individual who keeps the test records, with the same contact details. A position title is allowed if the position is always staffed.
- Manufacture: date (month and year at minimum) and place, including the manufacturer's name and contact details.
- Testing: the most recent test date and place, with contact details for each lab whose testing the certificate relies on.
- The attestation: paper and electronic certificates must carry the prescribed attestation, including the acknowledgment that a knowingly false statement is a federal crime.
The Act sets the same baseline: the certificate must identify the issuer and the lab, and must be legible and in English [52]. If the importer claims a statutory or regulatory testing exclusion, the certificate still lists the rule, and "shall identify the applicable testing exclusion" in place of the test date and place (§1110.11(c)).
Filing, availability and records
- eFiling at entry. For goods imported for consumption or warehousing (including from a Foreign Trade Zone, or under the de minimis duty exemption), the certifier "must eFile" the certificate data in ACE when filing the entry. For goods imported by mail, the data must be entered into CPSC's Product Registry before the goods arrive (§1110.13(a)(1)). I did not confirm the eFiling compliance dates in the 2025 rulemaking.
- One product per certificate. The certificate must accompany each product or shipment (§1110.13(a)).
- Copies. The importer must give a copy to each distributor and retailer, and must produce the certificate within 24 hours when CPSC or CBP asks (§1110.13(b)-(c)).
- Responsibility stays with the importer. It may rely on others to test, certify or enter data, but it "remains legally responsible" for the certificate's validity, accuracy, completeness and availability (§1110.15).
- Five-year retention. Certificates and the test records behind them must be kept for at least five years from the date the certificate was created (§1110.17).
Flammable Fabrics Act points specific to imports
- Dangerously flammable fabric imported for flame-retardant treatment. At the time of importation, the importer executes and gives CBP an affidavit stating that the goods "will not be sold or used in their present condition" but will be processed to remove the dangerous flammability. The importer also agrees to keep the required records [57][40]. CBP may ask for a specific-performance bond [58].
- Guaranties are a separate document. A guaranty protects against criminal prosecution under the Flammable Fabrics Act, and it must rest on "reasonable and representative tests" [59].
Consequences
- At the border. An import "shall be refused admission" if it lacks a required certificate, or carries a false one where the manufacturer in the exercise of due care has reason to know it is false or misleading. The same applies to a missing label or certificate (including tracking labels) required under §2063 [60]. Refused goods are destroyed unless export is permitted [60].
- Prohibited acts. Failing to furnish a required certificate, or issuing a false one, is a prohibited act [61].
- Certification does not replace compliance. Being tested and certified does not exempt a children's product from actually conforming to every applicable rule [52].