Do Private-Label Wool Suits for the US Need Flammability Testing? (16 CFR 1610)
Usually not for the cloth itself, if it is all wool. Under 16 CFR 1610.1(d), fabrics made entirely from wool, or entirely from any combination of acrylic, modacrylic, nylon, olefin, polyester and wool, are exempt from any requirement for testing to support flammability guaranties. Plain-surface fabrics of any fibre weighing 2.6 ounces per square yard or more get the same exemption. The exemption covers testing to support guaranties. The clothing flammability standard in Part 1610 still applies to the garment.
What does 16 CFR 1610 cover on a suit?
Part 1610 is the US flammability standard for clothing textiles. According to §1610.1(b), it sets the test methods, defines three classes of flammability, and warns against textiles whose burning characteristics make them unsuitable for clothing. Under §1610.1(e), it applies to fabric that is ready for use in wearing apparel, including finished garments.
A suit has more than one fabric, so the useful question is which layer falls under which part of §1610.1.
Which suit layers fall under the exemptions?
| Suit layer | What §1610.1 says | What to write in your spec |
|---|---|---|
| 100% wool shell cloth | (d)(2): fabrics made entirely of wool are exempt from testing to support guaranties | Exact fibre content from the mill |
| Wool/polyester or wool/nylon shell | (d)(2): combinations of the listed fibres are also covered | Confirm no fibre outside the list (e.g. silk, linen, viscose, cotton) |
| Wool blended with silk, linen, viscose or cotton | Not in the (d)(2) list; (d)(1) applies if plain-surface and at least 2.6 oz/yd² | Cloth weight in oz/yd² or g/m², plus surface type |
| Lining and pocketing | Part of the garment; covered by (d)(1) or (d)(2) or neither, depending on fibre and weight | Lining fibre and weight from the supplier |
| Interlining or canvas between shell and lining | (c)(4): the standard does not apply to interlining fabrics used between an outer shell and an inner lining | Name the construction: fused, half canvas or full canvas |
100% wool shell cloth: What §1610.1 says: (d)(2): fabrics made entirely of wool are exempt from testing to support guaranties · What to write in your spec: Exact fibre content from the mill
Wool/polyester or wool/nylon shell: What §1610.1 says: (d)(2): combinations of the listed fibres are also covered · What to write in your spec: Confirm no fibre outside the list (e.g. silk, linen, viscose, cotton)
Wool blended with silk, linen, viscose or cotton: What §1610.1 says: Not in the (d)(2) list; (d)(1) applies if plain-surface and at least 2.6 oz/yd² · What to write in your spec: Cloth weight in oz/yd² or g/m², plus surface type
Lining and pocketing: What §1610.1 says: Part of the garment; covered by (d)(1) or (d)(2) or neither, depending on fibre and weight · What to write in your spec: Lining fibre and weight from the supplier
Interlining or canvas between shell and lining: What §1610.1 says: (c)(4): the standard does not apply to interlining fabrics used between an outer shell and an inner lining · What to write in your spec: Name the construction: fused, half canvas or full canvas
2.6 oz/yd² works out to about 88 g/m² (1 oz/yd² ≈ 33.9 g/m²). That is why the lining line deserves a separate check: a lightweight lining in a fibre outside the (d)(2) list does not meet either exemption.
What should a US buyer write into the spec before the sample?
- Fibre content of the shell cloth, as the mill states it, including any small percentage of a fibre outside the (d)(2) list
- Fibre content and weight of the lining and pocketing, in oz/yd² or g/m²
- Construction: fused, half canvas or full canvas, so the interlining layer is identified (§1610.1(c)(4))
- Who issues the guaranty on your side (importer of record or your compliance adviser)
This post explains the rule text. It is not legal advice. Your compliance adviser decides how your guaranty is supported.
"We make fused, half-canvas and full-canvas jackets. MTM starts from 1 piece and bulk OEM from 50 after the 7–14 day sample is approved, so write the fibre content of each layer into the brief before that sample starts." — Shi Yuan Suit Factory (statement built from published factory policy)
FAQ
Are 100% wool suit fabrics exempt from US flammability testing?
Under 16 CFR 1610.1(d)(2), fabrics made entirely from wool, or entirely from combinations of acrylic, modacrylic, nylon, olefin, polyester and wool, are exempt from any requirement for testing to support guaranties. The garment is still within the scope of Part 1610.
Does the jacket canvas or fusible interlining need 16 CFR 1610 testing?
Under 16 CFR 1610.1(c)(4), the standard does not apply to interlining fabrics intended for use as a layer between an outer shell and an inner lining in wearing apparel.
What should I send Shi Yuan for a US-bound suit program?
The fibre content of the shell, lining and pocketing, the lining weight, and the construction (fused, half canvas or full canvas). The sample takes 7–14 days and bulk OEM starts from 50 after sample approval.
Core factory facts
- Manufacturing: MTM from 1, bulk OEM from 50, lead times
- Sample policy: sample fee, timing, revisions
- Process: specs, sample seal, QC
Related: Wool Products Labeling: required info on wool suits
Contact
WhatsApp +65 8013 8838 · Email houzhenying226@gmail.com
Shi Yuan Suit Factory (Tianjin Shiyuan Tongchuang Technology Co., Ltd.) · Est. 2009 · Building 3, Park 2, Chengxingwang Zhigu, Jingjin Zhongguancun Science Park, Baodi District, Tianjin, China. Acumenwear.com is our English export site.
