Flammable Fabrics Act requirements for US clothing importers

The Flammable Fabrics Act is the US framework behind CPSC clothing flammability standards, including CPSC 16 CFR Part 1610. For ordinary clothing, the definition that matters is the Part 1610 classification: Class 1 and Class 2 fabrics are permitted, and Class 3 fabrics shall not be used for clothing. Other standards under the Act cover vinyl plastic film, children's sleepwear, carpets and rugs, and mattresses, so a Part 1610 result does not settle those products. (CPSC Act guidance, Part 1610)

Testing and certification are separate questions. A fabric can be exempt from testing to support an initial guaranty and still need a children's certificate. Adult apparel has a narrow GCC enforcement-discretion policy. It doesn't extend to children's apparel. (Part 1610, adult-apparel policy, CPC guidance)

What 16 CFR Part 1610 covers

Part 1610 covers clothing textiles. That includes material ready for wearing apparel, finished garments and costumes. It is one standard under the Act, not the whole Act. (CPSC guidance)

Section 1610.1(c) takes some articles out of this standard, and each exclusion has a limit:

• Hats must not form part of a covering for the neck, face or shoulders when worn.
• Gloves must be no more than 14 inches long and must not be attached to or integral with another garment.
• Footwear must not include hosiery and must not be attached to or integral with another garment.
• Interlining must be a layer between an outer shell and an inner lining.

These are scope exceptions, not the fabric testing exemptions below. A lining doesn't become an excluded interlining just because it sits inside a garment. (Section 1610.1)

For garments, only uncovered or exposed parts are tested. Exposed linings and some reversible surfaces can fall within the test. An undergarment's outer surface counts as exposed, too. Check the exposed-part rules before you drop an inward-facing fabric from the test. (Part 1610, Subpart B)

Children's sleepwear needs its own scope check. Infant garments and qualifying tight-fitting sleepwear exceptions can still leave Part 1610, Part 1611, or both applicable. A sleepwear exception doesn't clear every flammability rule. (CPSC guidance)

Clothing flammability standards under Part 1610

Section 1610.4 splits plain-surface fabric from raised-surface fabric. Class 2 is raised-surface only. Read the table as classification thresholds. One specimen doesn't decide compliance. (Part 1610)

For raised surfaces, a surface flash alone doesn't make Class 3. The Class 1 flash path is a rapid surface flash of 0.0 to 7.0 seconds that does not ignite or fuse the base fabric. Qualifying base burns must result from surface flash, sustain flame in the base fabric and occur away from the flame-impingement point, and Section 1610.4 excludes the results designated "SFBB poi" and "SFBB poi*" from the base burns used for Classes 2 and 3. (Section 1610.4)

Laboratories have to follow the specimen and averaging rules in Section 1610.7. Testing begins with five specimens, and five more are required in specified cases. Raised-surface classification also depends on qualifying base-burn counts. And the final classification is the more severe result before or after refurbishing. A single burn time cannot replace that process. (Section 1610.7)

Which fabrics are exempt from testing?

Section 1610.1(d) gives two alternative exemptions from testing to support initial guaranties. Those exemptions are not the certificate rules below. They cover qualifying fabrics and products made entirely from qualifying fabrics:

• Plain-surface fabrics weighing at least 2.6 ounces per square yard qualify, whatever the fiber content.
• Plain- or raised-surface fabrics of any weight qualify if made entirely from acrylic, modacrylic, nylon, olefin, polyester, wool, or combinations solely of those fibers.

The weight route includes fabric at exactly 2.6 oz/yd². It doesn't cover raised-surface fabric. The fiber route depends on the entire composition, not the share of one listed fiber. (Section 1610.1(d))

A heavy raised surface is not automatically exempt. (Section 1610.1(d))

A cotton/polyester blend can't use the listed-fiber route, because cotton isn't listed. A plain-surface cotton/polyester fabric may still qualify on weight. But you need the surface type and the weight before you rely on that route. Neither route tells you that a particular garment qualifies without its construction and material details. (Part 1610)

Testing-exempt doesn't mean flameproof or flame-retardant. It also doesn't remove the underlying flammability requirement. CPSC keeps flammability enforcement in place in the adult-apparel certificate policy. (2016 enforcement policy)

What clothing importers must certify

For imported finished products, the importer is the responsible certificate issuer. Delegating tests, data entry or certification doesn't transfer that legal responsibility. Where a certificate is required and a testing exclusion applies, Section 1110.11(c) ordinarily requires the certificate to identify that exclusion instead of the test date and place for the rule. That ordinary rule doesn't erase the adult-apparel policy below. An FFA guaranty isn't a GCC or a CPC. (Part 1110, Part 1610, 2016 policy)

General-use apparel ordinarily uses a General Certificate of Conformity, or GCC, based on testing or a reasonable testing program. A third-party laboratory isn't mandatory for general-use products. Adult apparel that doesn't qualify for the testing exemption generally needs a GCC. (CPSC GCC guidance, adult-apparel policy)

Children's apparel generally needs a Children's Product Certificate, or CPC. Children's products are generally those intended primarily for children 12 or younger. Certification ordinarily relies on a CPSC-accepted third-party laboratory, subject to applicable testing exemptions and exceptions. A fabric testing exemption doesn't generally remove the CPC. The certificate should identify the applicable rule and the claimed exemption. (CPSC CPC guidance, Section 1107.20)

Adult-apparel GCC enforcement discretion

CPSC currently does not require a GCC for adult apparel qualifying for the Part 1610 testing exemption under its enforcement-discretion policy. The policy was published on March 10, 2016 and took effect on March 25, 2016. It is about certificate enforcement, not permission to sell noncompliant fabric. (Original policy)

The 2025 final certificate rule expressly preserves this treatment. The requirement to list testing exclusions on a certificate doesn't apply to this adult-apparel enforcement discretion, and no certificate is required where that discretion applies. The policy doesn't cover children's apparel, nonqualifying adult apparel or other obligations that still apply. Misrepresentation or omission about the §1610.1(d) facts can still bring enforcement, including civil or criminal penalties. CPSC also reserves prospective withdrawal with at least 90 days' notice. (2025 final rule, Section V.F, 2016 policy)

How eFiling affects apparel imports

The general applicability date for the revised certificate and eFiling framework is July 8, 2026. January 8, 2027 applies to regulated products imported into a foreign-trade zone and subsequently entered for consumption or warehousing. That later date is an applicability date, not a second effective date, and not a delay for every importer. (Official correction)

For covered imported finished products that must be certified, Section 1110.13 requires certificate data in ACE at entry. If entry and entry summary are filed together, the data goes with that filing. Mail imports use the Product Registry before arrival. RegAffairs AI's answer on clothing flammability requirements links the clothing rules discussed here. (Part 1110)

Qualifying adult apparel doesn't acquire a certificate obligation merely because eFiling applies. The final rule says a Disclaimer Message Set isn't required where no certificate is required, expressly including enforcement-discretion products. Disclaimer messages and intended-use codes are optional, but CPSC encourages them in those cases. (Final rule, Response 29)