What is recycled wool? The U.S. legal definition, the label rule and the 20% Woolmark floor

Recycled wool is wool fiber that has already been woven or felted into a product and has been turned back into fiber. That is the definition in U.S. federal law, and it applies whether the earlier product was a garment someone wore or offcuts from a mill. The law requires the label to say so. It does not say how much recycled wool a product must contain to carry a green claim, and that gap is where private standards come in.

What the law says

The Wool Products Labeling Act, at 15 U.S.C. 68, starts with what counts as wool. Wool is "the fiber from the fleece of the sheep or lamb or hair of the Angora or Cashmere goat," and it may include specialty fibers from the camel, alpaca, llama and vicuna, "which has never been reclaimed from any woven or felted wool product."

Recycled wool is defined in two clauses. The first covers fiber that results when wool has been woven or felted into a product which, "without ever having been utilized in any way by the ultimate consumer," was later made into a fibrous state. The second covers fiber from wool or reprocessed wool that was spun, woven, knitted or felted into a product which, "after having been used in any way by the ultimate consumer," was later made fibrous. In plain terms: the first is mill waste and unsold goods, the second is worn clothing.

The FTC's compliance guidance condenses this. It says recycled wool is wool returned to a fibrous state after being made into a wool product, whether or not a consumer has used it. Our reading is that the two clauses together mean any wool that has been through a finished product once.

What the label must say

The FTC is direct on disclosure: "Reclaimed or recycled wool fibers must be identified as recycled wool." Wool must be named with its percentage by weight in the fiber content statement, and the agency says you "must disclose wool or recycled wool by name and percentage weight, even if it is less than 5% of the product." That is an exception to the general rule that fibers under 5% can be grouped as "other fiber."

There is no recycled-content minimum in that guidance. A coat that is 3 percent recycled wool and one that is 100 percent both just have to say so. Reading a tag, the useful number is the percentage next to the words "recycled wool."

On accuracy, the FTC says the Wool Act and rules provide no tolerance for wool content, and that in practice it applies the 3% textile tolerance, but not when a label says the product is entirely wool, such as "100% Wool." For civil penalties, the FTC lists up to $53,088 per violation for violators of an administrative order, a figure it says was updated in January 2025, and it treats each instance of mislabeling as a separate violation.

How does this sit beside the better-known terms? Our explainer on Super 120s and wool suit labels covers the fineness numbers and the virgin wool rule. Recycled wool is the opposite end of that vocabulary: the fiber's history, not its thickness.

Where certification comes in

Because the law sets no floor, anyone making a sustainability claim leans on a standard. Two come up most.

Woolmark's specification RW-1, with an effective date of July 1, 2026, applies to Woolmark, Woolmark Blend and Wool Blend certified apparel and footwear. Its table requires a minimum 20% recycled wool, confirmed by a Global Recycled Standard (GRS) or Recycled Claim Standard (RCS) certificate submitted by the licensee. Recycled wool "includes reprocessed wool from pre-consumer and post-consumer source," with examples of "garments, woven selvage, fabric cutting waste, etc." A product can be pure recycled wool or a blend of recycled and new wool.

The specification also sets overall wool content (100% for Woolmark, 50% for Woolmark Blend, 30% for Wool Blend) and a mean fiber diameter of no more than 22.5 microns. That last number is a requirement for Woolmark-certified products. It is not a general quality grade for recycled wool.

The GRS threshold is higher. A December 12, 2025 paper by SDA Bocconi for the EU's textile transition pathways says the GRS "includes a higher (50%) minimum recycled content percentage" along with social and environmental requirements, and that the GRS and RCS standards apply when recycled wool is included in a product. The same paper does not give recycled wool's share of the wool supply, and we did not find a reliable figure elsewhere, so we do not state one.

What to check in a store or a listing

Start with the fiber content line. If a brand says "made with recycled wool," the tag should name recycled wool and give a percentage. A product that says 20 percent recycled wool and 80 percent new wool is correctly labeled, and it may be a fine product, but it is mostly new wool.

Then check what certification is claimed. A GRS or RCS certificate is the evidence behind a recycled content claim in the Woolmark system. A bare statement on a hangtag is not the same thing. Ask the brand for the certificate number if the claim is central to the sale.

Finally, remember what the label cannot tell you. It will not tell you whether the original material came from mill waste or worn garments, unless the brand volunteers it. The statute distinguishes those sources, but the tag does not.

Why recycled wool is not automatically better

The sources we reviewed make claims about definitions and certification, not about environmental outcomes, and so do we. The Bocconi paper stresses that wool's benefits are realized through long-lasting products plus reuse, repair and proper recycling or composting. A recycled wool sweater that falls apart after one season does not help much. Longevity and care matter at least as much as the origin of the fiber.

Our take

Recycled wool is a real, defined category with a clear label rule, which is more than most green fashion terms can say. But the rule stops at naming the fiber. Buy on the percentage and the certificate, not on the phrase, and treat anything vaguer as marketing until the brand shows the paperwork.