Artificial and Synthetic Fibers and Filaments Manufacturing (U.S.) — NAICS 325220

A Histometrics industry primer for public-market and private investors.

1. Overview

This industry makes the man-made fibers that most of the modern world wears, sits on, drives on, and filters through: polyester, nylon, spandex, acrylic, olefin (polypropylene), rayon, lyocell, and acetate. Plants take petrochemical or wood-pulp raw materials, melt or dissolve them into a polymer, and force that polymer through a spinneret (a metal plate with tiny holes, like a showerhead) to form continuous filaments or short "staple" fibers. Those fibers are then sold to textile mills, carpet makers, tire and auto suppliers, and nonwovens producers.

Why an investor cares: this is the upstream commodity-and-specialty layer of a multi-trillion-dollar global textile chain. It is capital-intensive, cyclical, and priced off oil and gas. Returns are driven not by fashion but by the spread between fiber prices and feedstock costs, by how full the plants run, and by whether a producer sits in low-margin commodity grades (where Chinese overcapacity sets the price) or in defensible niches (recycled content, high-strength industrial yarns, branded performance fibers).

Ways in differ sharply by investor type. Public-market investors have very few pure plays — most fiber output sits inside large, diversified chemical companies or foreign conglomerates. Private investors are arguably closer to the action here: the biggest U.S. producers are privately held (Koch's Invista), family-conglomerate-owned (Mexico's Alpek/DAK Americas), or recently passed through bankruptcy into the hands of lenders and distressed-debt funds (Ascend, Lycra). This is a sector where the interesting equity often trades as private stakes and restructured debt, not tickers.

2. What it is and how it's structured

Scope. NAICS (North American Industry Classification System) code 325220 covers establishments that manufacture cellulosic fibers (e.g., rayon, acetate, lyocell — made from wood pulp) and non-cellulosic/synthetic fibers (e.g., nylon, polyester, acrylic, polyolefin, spandex — made from petrochemicals), in the form of monofilament, filament yarn, staple, or tow, plus the texturizing of those fibers when it occurs at the same establishment.[1] "Filament" means a continuous strand; "staple" means fiber chopped to short lengths for spinning into yarn; "tow" is a thick untwisted rope of filaments (the raw form used, for example, in cigarette filters). The industry is within the formal NAICS manufacturing sector 31–33.

This boundary matters. A polyester-chip producer, a fiber spinner, and a yarn texturizer may sit next to one another in the value chain but report under different NAICS codes. Conversely, 325220 contains economically dissimilar products: commodity polyester staple, qualified nylon airbag filament, recycled apparel yarn, and cellulose-acetate cigarette-filter tow.

What it excludes — and where the adjacent activity is classified:

• Making the polymer or resin before it is spun into fiber (PET resin, nylon polymer) is NAICS 325211, Plastics Material and Resin Manufacturing. Many large producers are vertically integrated and do both, but the codes are separate.
• Spinning purchased fiber into yarn and weaving or knitting fabric is NAICS 313, Textile Mills (e.g., 313110 Fiber, Yarn, and Thread Mills). Texturizing purchased fiber also belongs in 313110, not 325220.
• Turning fiber into carpet is NAICS 314110, Carpet and Rug Mills (Shaw, Mohawk) — even though carpet consumes huge volumes of nylon and polyester fiber.
• Textile glass fiber sits under NAICS 327212 (nonmetallic minerals), not here. Natural fibers (cotton, wool) are agricultural/textile, not chemical.

The physical operation begins with a polymer or polymer precursor. Polyester and polyolefin are generally melt-spun through spinnerets; nylon producers may be integrated backward into intermediates; cellulose acetate begins with high-purity wood pulp and acetyl chemistry. Newly formed filaments are cooled or coagulated, drawn to orient the molecules, potentially crimped or texturized, and then wound as filament yarn or cut into staple. Plants are capital- and energy-intensive, run best at high utilization, and depend on precise control of polymer quality, denier, tensile properties, dyeability, and contamination. Qualification can be demanding in airbags, military textiles, filtration, and medical uses.

Ownership mix. This is a concentrated, capital-heavy industry: a handful of large chemical firms plus foreign multinationals, with a tail of smaller specialty spinners. The Census counts 107 firms operating 129 establishments.[2] Ownership skews private and foreign — Koch (Invista), Alpek/Grupo Alfa (DAK Americas), Formosa Plastics (Nan Ya), Indorama Ventures (Auriga) — with only a few U.S.-listed names carrying material fiber exposure.

3. How big it is

Our federal ground-truth figures for NAICS 325220:

This is a small, high-productivity industry by headcount — about $6.8 billion of shipments from under 14,000 workers implies roughly half a million dollars of output per employee, consistent with automated, continuous-process chemical plants rather than labor-intensive sewing floors.

Undercount caveat — mostly the opposite problem. Unlike industries dominated by tiny operators or government (where federal business statistics undercount activity), 325220 is capital-intensive and concentrated, so the Census captures it well. Two nuances matter instead. First, the $6.8 billion is domestic factory shipments only — the U.S. market for synthetic fiber is far larger than domestic output because most fiber now arrives embedded in imported yarn, fabric, and finished apparel; global "synthetic fiber market" estimates in the hundreds of billions of dollars are not comparable to this figure.[5] Second, because the big producers are vertically integrated, some fiber-related output and employment can be reported under the adjacent resin code (325211), so the boundary between "fiber" and "polymer" statistics is somewhat porous. The most common misreporting is to treat 325220 as synonymous with textile yarn or with all man-made fibers — it is neither, including cigarette-filter tow and intermediate fiber forms while excluding much purchased-fiber texturizing. Public-company segment revenue is also routinely presented as "U.S. industry size" even when it is global and includes chemicals or downstream products.

The long arc is one of managed decline and repositioning. U.S. man-made fiber employment fell from roughly 37,000 in 1997 toward 31,000 by 2000 and kept shrinking as commodity production moved to Asia; the survivors retreated into specialty and recycled grades.[6] The broader U.S. textile supply chain (fiber through apparel) still ships around $60 billion a year and employs about 450,000 people, but fiber-making is the thin, upstream slice of that.[7]

4. The investable universe

There is no clean, large-cap U.S. pure-play in synthetic fibers. The closest listed pure-play is a small-cap; broader exposure comes through diversified chemical companies (where fiber is one segment) or foreign multinationals.

Publicly listed companies with meaningful fiber exposure

Tickers, prices, and multiples are for the how-to-invest discussion only; none of these except Unifi is primarily a fiber company.

Major private and other owners (often the real production leaders):

• Invista (owned by Koch, Inc. since 2004; Wichita, KS) — a leading nylon 6,6 and polypropylene producer, integrated through intermediates, polymers, and fibers; high-strength Cordura, and Antron/Stainmaster carpet fibers. Invista kept its nylon business but sold its branded apparel fibers (Lycra, Coolmax, Thermolite, Supplex, Tactel) to China's Shandong Ruyi in 2019.[14][15]
• Ascend Performance Materials (Houston) — the world's largest fully integrated nylon 6,6 (polyamide 66) producer, manufacturing resins, fibers, and chemicals. Filed Chapter 11 in April 2025 amid a global nylon glut and emerged in December 2025 with lenders converting roughly $2 billion of debt into equity.[16]
• DAK Americas / Alpek Polyester (part of Mexico's Alpek / Grupo Alfa; Charlotte, NC) — the leading polyester staple fiber and PET producer in the Americas, with about 1,300 U.S. staff across the Carolinas, Mississippi, Indiana, and Pennsylvania.[17]
• The Lycra Company — the spandex business (Lycra brand) carved out of Invista/DuPont; after Ruyi defaulted, control passed to creditors, and the company filed a prepackaged Chapter 11 in March 2026 to shed ~$1.2 billion of debt.[18]

Competitive landscape within acetate tow. Eastman identifies Celanese, privately held Cerdia, Daicel, and Jinan Acetate Chemical as its principal tow competitors; in acetate yarn and staple, it lists Lenzing, Aditya Birla, and UAB Dirbtinis Pluostas as peers.[9] Eastman's Fibers segment is customer-concentrated: its ten largest customers represented approximately 65% of 2025 segment sales.[9]

5. How the money works

Owners in this industry make money on volume times spread, run through very high fixed costs.

• Feedstock spread is everything. The dominant cost is raw material, and the raw materials are oil- and gas-derived. Polyester is made from purified terephthalic acid (PTA) and monoethylene glycol (MEG), both tracing back to paraxylene and ethylene. Nylon 6,6 comes from adipic acid and hexamethylenediamine (benzene, butadiene, ammonia); nylon 6 from caprolactam; acrylic from acrylonitrile; spandex from polyurethane chemistry. Cellulosics use wood pulp plus solvents — Eastman identifies wood pulp, methanol, and high-sulfur coal as key Fibers inputs.[9] Profit is the gap between the fiber's selling price and this feedstock (plus energy) cost — producers watch the "spread" the way a refiner watches the crack spread. When oil-linked inputs move faster than fiber prices, margins compress instantly.
• Capacity utilization / operating rate. These are continuous-process plants with heavy depreciation, maintenance, energy, and technical labor loads, so the operating rate (share of capacity actually running) drives unit cost. Running full spreads fixed costs over more kilograms; running at 70% can turn a profit into a loss. Global overcapacity is therefore the industry's central margin problem. Destocking or import pressure can compress margins faster than sales decline.
• Commodity vs. specialty mix. Standard staple and filament are near-commodities where imports set the price and margins are razor-thin. The money is in defensible grades: recycled-content fiber (Unifi's Repreve), high-tenacity industrial and tire yarns, branded performance fibers (Cordura, creora, Lycra), and cellulosics with a sustainability story (Naia, Tencel). Mix shift toward specialty is the main lever a U.S. producer can pull.
• Integration. Owning the upstream polymer or feedstock (as Invista, Ascend, and DAK do) captures more of the chain and buffers margin volatility; merchant fiber-spinners without that integration are more exposed. Eastman's Kingsport site exemplifies full integration with internal acetate-flake supply.[9]
• Contractual structures. Acetate-tow contracts commonly fix pricing for one or more years, creating a lag between raw-material changes and realized margins — a stabilizer in volatile markets.[10]
• Working capital and leverage. Oil-linked inventory ties up cash and swings in value; several players carried heavy debt into a down-cycle, which is why the past two years produced multiple bankruptcies rather than gentle losses.

Profitability contrast. Eastman's global Fibers segment generated $1.05 billion of 2025 sales and $283 million of EBIT (approximately 27% EBIT margin), down from $1.32 billion of sales and $454 million of EBIT in 2024 — a 20% sales decline and 38% EBIT decline driven by acetate-tow destocking, industry capacity-share adjustments, weaker textile volumes, and higher costs.[9] Unifi shows the other end: its Americas segment recorded $347.9 million of fiscal-2025 sales with a $20.2 million gross loss (negative 5.8% gross margin), driven by low plant utilization, pricing pressure, productivity problems, and weak customer demand.[8]

6. What drives demand

• Apparel and home textiles are the largest end market — apparel alone is roughly half of synthetic-fabric demand.[5] Polyester's share keeps rising because it is cheap, durable, and stretch-blendable.
• Automotive. Interiors, seatbelts, airbags, and especially nonwovens — a modern car contains tens of kilograms of nonwoven fabric across dozens of parts.[19] Tire reinforcement (nylon and polyester tire cord) is a large, growing industrial outlet.[20]
• Nonwovens, filtration, and hygiene. Polypropylene and polyester dominate wipes, diapers, medical fabrics, and air/liquid filtration — a structurally growing, less fashion-cyclical demand pool.
• Industrial and technical textiles. Ropes, geotextiles, composites, protective gear, and construction reinforcement.
• Global backdrop. Polyester is about 57% of all fiber produced worldwide (roughly 71 million tonnes in 2024), and China controls well over 60% of production; the vast majority of new fiber-making equipment is installed in China.[5] That single fact — where the marginal tonne is made — shapes prices for every U.S. producer.
• Acetate tow faces a structural tobacco headwind. Declining cigarette consumption is the larger risk rather than another fiber winning share. Eastman is repurposing tow capacity toward textile fibers, while Celanese announced the intended closure of its Lanaken tow plant citing declining demand and regulatory uncertainty.[9][21]
• Recycled content and circularity are the most visible growth theme. Unifi processes bottles into flake and polymer for Repreve polyester products, extending that platform into nonwovens, carpet fiber, and packaging. Eastman is using carbon-renewal technology to substitute recycled waste feedstock in cellulosic products. The economic question is whether customers will pay for certified content and traceability — recycling does not remove commodity-price or utilization risk.[8][9]
• Trade rules create a defensible regional niche. The Berry Amendment requires certain Defense Department textiles and their yarns and fibers to be U.S.-made; regional free-trade agreements add further qualification requirements.[8]

7. Regulation

• Trade remedies are the defining policy lever. U.S. producers rely on antidumping (AD) and countervailing duty (CVD) orders to survive against subsidized imports. Orders on fine denier polyester staple fiber from China, India, South Korea, and Taiwan have been in force since 2018 (Chinese dumping margins ran 65–103%) and were continued in 2024 after a five-year "sunset" review found injury would likely recur; the petitioners were DAK Americas, Nan Ya, and Auriga.[13][22] Broader 2025 tariff changes are further reshaping fiber and textile trade flows — helping domestic staple producers but raising input costs and threatening exports.[5]
• Environmental and chemical rules. As petrochemical plants, producers are regulated under the Clean Air Act (volatile organics and hazardous air pollutants), Clean Water Act, RCRA, CERCLA, OSHA process-safety requirements, and the Toxic Substances Control Act (TSCA) for the monomers and solvents they handle. Polymer and acetyl plants handle combustible, toxic, or otherwise hazardous chemicals. Eastman reported $339 million of company-wide environmental protection and improvement cash expenditures in 2025, including approximately $80 million of environmental capital expenditure (covering all Eastman businesses, not just Fibers).[9]
• Microplastics and microfibers — the rising regulatory risk. Textiles are the largest known source of marine microplastic pollution, and lawmakers are responding: the proposed federal Fighting Fibers Act of 2025 would require microfiber filters on new washing machines, several states have advanced microfiber-shedding rules, and in late 2025 governors of seven states petitioned the EPA to regulate microplastics in drinking water.[23] Environmental concern over persistent synthetic microfibers may benefit cellulosics or recycled products, but it can also impose testing, disclosure, or product-design costs. Separately, PFAS ("forever chemicals") restrictions target certain textile finishes and coatings rather than the base fibers, but they raise compliance risk across the chain.
• End-market regulation feeds back. Eastman's fiber profits lean heavily on acetate tow for cigarette filters, so tobacco regulation and declining smoking are a slow structural headwind for that niche.[9]

8. Competitive dynamics and consolidation

The U.S. industry is what remains after decades of consolidation and offshoring. DuPont — which invented nylon and commercialized much of the field — exited: its fiber and intermediates businesses became Koch's Invista, and its PET/polyester assets became DAK Americas. Concentration statistics show a top-heavy structure: the four largest firms hold about 44.4% of revenue, the top eight 61.8%, the top twenty 83.5%, and the top fifty 97%, with a Herfindahl-Hirschman Index of 712.4 — moderately unconcentrated by antitrust math but dominated at the top by a few scale players over a long tail of small specialists.[2]

The competitive story of the mid-2020s is global overcapacity, especially in China, crushing commodity margins. Nylon 6,6 oversupply drove Ascend into Chapter 11 in 2025; the spandex glut helped push The Lycra Company into bankruptcy in 2026.[16][18] Even in the more defensible acetate-tow niche, destocking and capacity-share adjustments drove Eastman's Fibers EBIT down 38% in 2025, and Celanese announced the intended closure of its Lanaken tow plant.[9][21] The strategic response among survivors is consistent: retreat from commodity grades, invest in recycled and specialty/high-tenacity products, and integrate upstream. Expect continued rationalization — plant closures, debt-for-equity restructurings, and niche specialization rather than greenfield commodity expansion in the U.S.

9. Risks

• Feedstock and energy volatility. Margins can invert in weeks when oil-linked input costs outrun fiber prices.
• Chinese overcapacity and import competition. The structural oversupply that bankrupted nylon and spandex producers is not resolved and caps pricing power in commodity grades. Import competition is acute in products that can be shipped economically and specified generically.
• Cyclicality. Apparel and auto demand are economically sensitive; a consumer or auto downturn hits volumes and operating rates directly.
• Leverage / solvency. Several major producers entered the down-cycle over-indebted; balance-sheet risk is real, as the recent Chapter 11 wave shows.
• Trade-policy whiplash. Duties cut both ways — protection for domestic staple can coincide with higher feedstock costs and retaliation against U.S. fiber exports (a high share of some producers' revenue). Protection under the Berry Amendment or regional trade agreements is valuable but politically contingent.[5]
• Substitution. Polyester can replace nylon where performance permits; polypropylene can replace either in cost-sensitive applications; cotton, wool, and cellulosic fibers compete in apparel.
• ESG and microplastics regulation. Filtration mandates, microfiber rules, PFAS restrictions, and reputational pressure on virgin synthetics could raise costs and, over time, shift demand toward recycled and cellulosic fibers.
• End-niche decline. Structurally shrinking outlets (cigarette-filter tow) weigh on specific segments.
• Labor. Skilled operators, maintenance technicians, engineers, and process-safety personnel are difficult to replace. Eastman reports an increasingly competitive hiring environment at manufacturing sites. A labor shortage or strike matters disproportionately when it interrupts a continuous plant.[9]

10. How to invest and the outlook

Public-market routes. There is no large, clean U.S. fiber stock. The purest listed exposure is Unifi (UFI) — a small-cap recycled/performance-yarn maker whose fortunes track recycled-content demand, feedstock spreads, and its Repreve brand; it is a volatile, execution-dependent story that has recently run at a loss, with its Americas segment posting a negative 5.8% gross margin in fiscal 2025.[8] For fiber exposure inside a larger, steadier business, Eastman (EMN) offers a cellulosic/acetate Fibers segment (~12% of company sales) that delivered 27% EBIT margins in 2025 despite a down year, though that segment is customer-concentrated and tobacco-exposed.[9] Celanese (CE) carries acetate tow and a 70%-owned nylon/PBT filament joint venture — but in both, fiber is a minority of a diversified chemical company.[10] Investors wanting scale in commodity polyester/nylon/spandex must look to foreign listings — Indorama Ventures (IVL), Toray (3402), Hyosung TNC (298020), Lenzing (LNZ), or Nan Ya/Formosa (1303) — each a diversified materials group, not a fiber pure-play. Because valuations here move with the petrochemical cycle, these trade more like commodity chemicals than growth stories.

Private-market routes. This is where the leading U.S. producers actually live: Invista inside privately held Koch (making ordinary minority access unlikely); DAK Americas inside Mexico's listed-but-family-controlled Alpek; Ascend now owned by its former lenders; The Lycra Company controlled by creditors. The realistic private angles are (a) distressed and restructured debt — the recent Chapter 11s at Ascend and Lycra converted lenders into owners of real, cash-generating asset bases at reset valuations; (b) strategic/PE ownership of specialty and recycled-fiber platforms; and (c) real-asset plays on individual plants and integrated PTA/PET complexes. A private buyer should underwrite plant-by-plant utilization, feedstock integration, customer qualifications, environmental liabilities, maintenance capital, energy contracts, and eligibility under trade or defense procurement rules — not a generic global "synthetic fiber market" growth rate.

Near-term drivers to watch (forward-looking): the trajectory of oil- and gas-linked feedstock costs and thus fiber spreads; the 2025–2026 tariff regime and whether AD/CVD protection widens; whether Chinese capacity finally exercises discipline or keeps flooding commodity grades; brand and regulatory pull toward recycled and lower-impact fibers (a tailwind for Unifi, Lenzing, Eastman's Naia); the auto and apparel demand cycle; and how cleanly the recently restructured players (Ascend, Lycra) return to profitability. The likely shape of the next few years is a smaller, more specialized U.S. industry — leaning on recycled content, high-strength industrial fibers, trade protection, and integration — rather than a return to commodity-volume growth. These are analytical judgments, not guarantees.

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Sources

1. U.S. Census Bureau. "2022 NAICS Definition — 325220 Artificial and Synthetic Fibers and Filaments Manufacturing." 2022. https://www.census.gov/naics/?details=32522&input=32522&year=2022
2. U.S. Census Bureau. "2022 Economic Census — Concentration and receipts, NAICS 325220" (firms, receipts $6.80B, CR4/CR8/CR20/CR50, HHI). 2022. https://www.census.gov/programs-surveys/economic-census.html
3. U.S. Census Bureau. "County Business Patterns 2023 — NAICS 325220" (establishments, employment, annual and Q1 payroll). 2023. https://www.census.gov/programs-surveys/cbp.html
4. U.S. Small Business Administration. "Table of Small Business Size Standards" (325220 = 1,050 employees). 2023. https://www.sba.gov/document/support-table-size-standards
5. Fashionating World / Chemical Market Analytics (OPIS) and Market Research Future. "Global polyester and synthetic-fabric market size, China capacity share, 2024–2025 trade shifts." 2025. https://www.fashionatingworld.com/new1-2/the-polyester-pipeline-why-the-world-still-weaves-through-china
6. USDA Economic Research Service. "Output and employment in the U.S. textile industry has stabilized" (man-made fiber employment history). https://www.ers.usda.gov/data-products/charts-of-note/chart-detail?chartId=78565
7. National Council of Textile Organizations (NCTO). "U.S. Textile Industry — Facts & Figures" (supply-chain shipments and employment). 2025. https://ncto.org/facts-figures/us-textile-industry/
8. Unifi, Inc. "Form 10-K, Fiscal Year 2025" (net sales ~$560M; Americas segment $347.9M, negative 5.8% gross margin; Repreve share; Berry Amendment compliant yarns). 2025. https://www.sec.gov/Archives/edgar/data/100726/000095017025111331/ufi-20250629.htm
9. Eastman Chemical Company. "Form 10-K, FY2025" (Fibers segment sales $1.05B, EBIT $283M; acetate tow 69%; Naia; Kingsport integration; competitors; customer concentration 65%; feedstock inputs; environmental expenditures). 2026. https://www.sec.gov/Archives/edgar/data/915389/000091538926000013/emn-20251231.htm
10. Celanese Corporation. "Form 10-K, FY2025" (acetate tow; 70%-owned filament JV; contract pricing practices). 2026. https://www.sec.gov/Archives/edgar/data/1306830/000130683026000031/ce-20251231.htm
11. Indorama Ventures. "Auriga Polymers (Indorama Ventures USA)" and 2024 Annual Report. 2024. https://www.indoramaventures.com/en/worldwide/774/auriga-polymers
12. Hyosung TNC. "Company / creora spandex" and Wikipedia summary. 2025. https://en.wikipedia.org/wiki/Hyosung_TNC
13. U.S. International Trade Commission. "Fine Denier Polyester Staple Fiber from China, India, Korea, and Taiwan — injury determination" (petitioners DAK Americas, Nan Ya, Auriga). 2018. https://www.usitc.gov/press_room/news_release/2018/er0628ll973.htm
14. Koch, Inc. "INVISTA Completes Sale of Apparel & Advanced Textiles to Shandong Ruyi" (Invista kept nylon; sold Lycra/Coolmax/etc.). 2019. https://www.kochinc.com/media-resources/invista-completes-sale-of-apparel-advanced-textiles
15. INVISTA. "About INVISTA" (Koch ownership since 2004; nylon 6,6 and polypropylene; integration through intermediates). 2025. https://www.invista.com/about
16. Chemical & Engineering News (C&EN) and PR Newswire. "Ascend Performance Materials files Chapter 11 (April 2025) and emerges (December 2025)." 2025. https://cen.acs.org/business/finance/Nylon-maker-Ascend-files-bankruptcy/103/web/2025/04
17. Alpek Polyester / DAK Americas. "About Us — Locations; DuPont fiber and PET acquisition; U.S. operations." 2025. https://www.alpekpolyester.com/about-us/
18. Sourcing Journal / Stretto. "The Lycra Company files prepackaged Chapter 11 to eliminate $1.2B debt; ownership history after Ruyi default." 2026. https://sourcingjournal.com/sustainability/sustainability-news/lycra-company-files-chapter-11-bankruptcy-restructuring-1234817373/
19. Data Bridge Market Research. "North America Automotive Non-Woven Market" (nonwoven content per vehicle). https://www.databridgemarketresearch.com/reports/north-america-automotive-non-woven-market
20. The Business Research Company / Future Market Insights. "Tire Cord Fabric Market Report" (size and growth). 2026. https://www.thebusinessresearchcompany.com/report/tire-cord-fabrics-global-market-report
21. Celanese Corporation. "Lanaken Plant Closure Announcement" (acetate tow demand decline and regulatory uncertainty). 2025. https://www.sec.gov/Archives/edgar/data/1306830/000130683025000203/a202510xxex991projectwhite.htm
22. Federal Register. "Fine Denier Polyester Staple Fiber from China, India, Korea, and Taiwan: Continuation of Antidumping and Countervailing Duty Orders." 2024. https://www.federalregister.gov/documents/2024/04/11/2024-07692/
23. Jenner & Block; Beyond Plastics; Holland & Knight. "Federal and state efforts on synthetic microfiber pollution; Fighting Fibers Act of 2025; EPA microplastics petition (Nov 2025)." 2025–2026. https://environblog.jenner.com/2024/04/25/federal-and-state-efforts-to-address-synthetic-microfiber-pollution-from-textiles/