Skip to content

US Clothing Brand: The Rules Most Founders Miss

Starting a clothing brand looks simple: design some pieces, find a manufacturer, launch a website. What catches most first-time apparel founders off guard is the compliance — not the design. Your fabric choice affects which flammability standard applies. Your trim supplier determines whether you need a Prop 65 warning. Your packaging can make your product illegal in California if it fails a heavy metal test.

This guide walks through launching a clothing brand with the compliance steps built in at each stage — so you are not reworking labels and repackaging inventory the week before launch.

On the Sustalium platform, the apparel compliance issue we see most often is not missing flammability tests — it is missing Prop 65 assessments. A brand launches a clothing line with a valid GCC, correct FTC labels, and compliant packaging. Six months later, a Prop 65 enforcement notice arrives because a metal zipper or a screen-printed design contained a listed chemical above the safe harbor level. The testing costs $300. The settlement costs 100 times that.

Not sure which rules apply to your clothing brand? Use the Sustalium Global Compliance Map — pick your market and product type, and see every framework from CPSC flammability to state PFAS restrictions.

Step 1: Choose Your Product Type (It Determines Your Compliance Path)

Not all clothing is regulated the same way. The most important decision you make — before fabric, before design, before manufacturer — is your product category, because it determines which federal standards apply:

Product Type Mandatory Testing Certificate Required
Adult everyday clothing (t-shirts, jeans, dresses) Flammability (16 CFR 1610) GCC
Children's everyday clothing (ages 0-12) Flammability + lead in substrates + phthalates CPC
Children's sleepwear (ages 0-14) Stricter flammability (16 CFR 1615/1616) + lead + phthalates CPC
Performance/outerwear (rain jackets, ski wear) Flammability (16 CFR 1610) + potential PFAS restrictions GCC

The gap between a GCC and a CPC is significant. A CPC requires third-party testing at a CPSC-accepted laboratory for every applicable standard — lead in every fabric, every trim, every button and zipper. A GCC requires a reasonable testing program but does not mandate a CPSC-accepted lab for general adult clothing. The cost difference can be \(3,000-\)8,000 per SKU for children's clothing vs. \(500-\)1,500 for adult.

Children's sleepwear is the most stringent category. The fabric must self-extinguish after flame exposure. Many fabrics that pass the general apparel standard fail the sleepwear standard. If you plan to sell pajamas, robes, or nightgowns for children, budget for the testing up front and design with compliant fabrics from the start — reformulating after you have ordered inventory is expensive.

See the full guide: [US Apparel Compliance: Flammability, Labeling & State Regulations]

Step 2: Find a Manufacturer Who Provides Compliance Documentation

A manufacturer who says "yes, we can make that" is not the same as a manufacturer who can provide:

  • Fabric composition documentation: The exact fiber content and percentages by weight, which you need for your FTC fiber content label
  • Component test reports: Lead and phthalate test reports for zippers, buttons, snaps, and applied decorations (required for children's clothing)
  • PFAS-free declaration: If your garment has water-resistant or stain-resistant treatments, a declaration that PFAS is not intentionally added
  • Care instructions: Washing, drying, and ironing guidance to support your FTC care label

Request these before you place the production order. A manufacturer who cannot provide them early in the process will not suddenly produce them when the shipment arrives.

Step 3: Get Your Labels Right

Three federal labeling requirements apply to every garment sold in the US:

Fiber content: A permanently affixed label listing generic fiber names and percentages by weight. "60% Cotton / 40% Polyester." Fibers under 5% can be labeled as "other fiber" unless they have a functional significance (like spandex for stretch).

Country of origin: A conspicuous, English-language label indicating where the garment was manufactured. For imported garments, this is the country of final assembly — not the country of the fabric or the country of the brand's headquarters.

Care instructions: A label with washing, drying, ironing, and bleaching instructions that must remain legible for the life of the garment. The FTC's care labeling rule provides safe harbor if you follow ASTM D5489 for care symbols.

These are enforced by the FTC, not the CPSC. A garment with a missing or incorrect fiber label can result in an FTC action even if it has a perfectly valid CPSC flammability certificate.

Step 4: Flammability Testing — Do Not Ship Without It

Every garment must comply with the flammability standard for its category. Class 3 fabrics under 16 CFR 1610 — fabrics that exhibit rapid and intense surface flash — may not be sold in the US for wearing apparel. Sheer rayon, brushed cotton fleece, and certain synthetic blends can fail.

The test is not optional. If a consumer is injured in a garment-related fire and your clothing was never tested, the product liability exposure is severe. Testing costs are modest relative to the risk — \(150-\)500 per fabric type.

The CPSC Enforcement Reality

The CPSC does not pre-approve garments. It investigates after a product is on the market — typically after an injury report, a consumer complaint, or a competitor tip. When the CPSC opens an investigation, the first document it requests is the GCC or CPC. If that document does not exist or does not list the correct standard, the investigation escalates quickly.

CPSC can — and does — issue civil penalties for non-compliance. Penalties for GCC/CPC violations have ranged from tens of thousands to millions of dollars, and the agency has increasingly sought individual liability against corporate officers rather than just corporate fines. A small brand that assumes it is too small for CPSC enforcement is betting against an agency that has explicitly stated it does not exempt small businesses from mandatory safety standards.

Step 5: Check California, Then Check Every Other State

California's Proposition 65 is the compliance obligation that apparel founders consistently miss:

  • Lead in trims: Screen zippers, snaps, metal buttons, and metallic decorations. Lead is common in costume jewelry components that appear on clothing — decorative buttons, rhinestone settings, charm attachments.
  • Phthalates in prints: Screen-printed designs on synthetic fabrics, PVC patches, and plastic tags can contain listed phthalates above safe harbor levels.
  • Formaldehyde in finishes: "Wrinkle-free," "easy care," and "permanent press" finishes often use formaldehyde-based resins. If the residual formaldehyde exceeds the Prop 65 safe harbor level, you need a warning.

A Prop 65 warning on your website or at the point of sale is a cost-free protection against citizen enforcement lawsuits — but only if the warning is actually required. Putting a Prop 65 warning on a product that does not need one is legal but erodes consumer trust. Getting the chemical testing right is the better path.

For performance outerwear: water-resistant and stain-resistant fabrics often contain PFAS-based durable water repellent (DWR) treatments. Minnesota, New York, and California have implemented or are phasing in PFAS restrictions on apparel. A PFAS-treated rain jacket may be legal in one state and restricted in another — and for a brand selling nationally, that effectively means the jacket is not compliant.

Prop 65 Is Enforced by Private Lawsuits, Not by the State

California's Proposition 65 is unusual in that it is primarily enforced by private plaintiffs — not by the California Attorney General. Law firms specializing in Prop 65 litigation scan retailer websites and Amazon listings for products that contain listed chemicals without a warning. When they find one, they issue a 60-day notice of violation, which gives the manufacturer or retailer 60 days to cure the violation before a lawsuit is filed.

The typical resolution is a settlement: the manufacturer agrees to add the warning (or reformulate) and pays the plaintiff's attorney fees — often $15,000 to $50,000 per settlement, even for a small brand. The settlements are public record and are tracked by the same firms that scan for new targets.

For a clothing brand, the cost of testing a garment for Prop 65 chemicals is \(300-\)800. The cost of a Prop 65 settlement is 20 to 100 times that amount — and the settlement data shows that small and mid-size brands are frequently targeted because they are less likely to have warning programs in place. Testing before you list is the least expensive Prop 65 strategy by a wide margin.

Step 6: Selling Channels — What Each One Requires

  • Your own website (Shopify, Squarespace): You need the flammability GCC/CPC, the FTC labels, and any required Prop 65 warnings. No third-party verification is required.
  • Amazon: Amazon has increasingly required CPC submission for children's clothing and may require flammability test documentation for adult apparel categories. Listings in the children's clothing category without a CPC uploaded are suppressed.
  • Wholesale to boutiques: Independent retailers generally rely on the brand's compliance. Provide your GCC/CPC and testing documentation proactively. A boutique that receives a CPSC inquiry about your product will immediately require your documentation — and if you cannot produce it, the relationship and your reputation in that buyer's network are damaged.

How Sustalium Helps You Launch a Clothing Brand

Most clothing brands start with design and manufacturing and only encounter compliance when Amazon asks for a CPC or California asks for a Prop 65 warning. That reactive approach leads to rush testing, label redesigns, and listings taken offline.

Sustalium gives you a structured compliance foundation from your first SKU:

  • GCC / CPC Builder — Generate the correct certificate based on your product type and age grade, with the applicable flammability standard included
  • Prop 65 & Chemical Compliance — Link test data for lead, phthalates, and formaldehyde to your product profiles
  • PFAS Declaration Management — Document your DWR treatment status and track state restriction deadlines
  • Amazon-Ready Documentation — Upload your CPC and test reports into a public compliance page that Amazon seller support can verify

Launch Your Clothing Line with Compliance Built In

Design gets the first order. Compliance keeps the brand online. Plan your testing and labeling alongside your design and manufacturing — not after your inventory arrives.

With Sustalium, build your apparel compliance documentation for just €10 per document.

Start Your Apparel Compliance Now →

Last updated: July 18, 2026