How to read a mattress law tag
Every mattress sold legally in the United States carries a permanent Uniform Law Label sewn to the product, mandated by federal and state statutes. Reading it in about 30 seconds lets you check three things: which factory built the bed, what is inside it, and whether the filling list names glass or fiber.
The tag is a disclosure document, not a marketing surface. Sales pages can claim a great deal, but the sewn tag lists the fillings by weight and names the plant that produced them.
- Check the factory URN. The Uniform Registry Number names the factory and plant that built your bed and traces it to a licensed U.S. facility.
- Check the filling weights. Federal law requires every filling listed by weight, so you can see what is inside instead of trusting ad copy. Look for the percentage next to each material, such as polyurethane foam, cotton batting, or a rayon and wool barrier.
- Check for fiberglass. Scan the filling list for the words glass, silica, or fiber, which mean fiberglass. A list that names only cotton, wool, or a plant fiber and calls out no glass component is the signal most shoppers are looking for.
- What the tag does not guarantee. A law tag and a certificate are specific documents with specific limits. CertiPUR-US only tests the foam layers; it does not certify the whole bed as organic. GOTS certification only covers the outer cotton cover, and the inner foams can still be standard polyfoam. A certificate covers the component it names, not the whole mattress, and neither a tag nor a seal is a comfort rating, a durability rating, or proof that a bed suits a particular sleeper.
Decoding the Uniform Registry Number (URN)
The registry number is the legal ID for each mattress plant. State bedding officers inspect this code. They track plant visits and check clean conditions.
A URN has three parts that read left to right as a state prefix, a manufacturer ID, and a plant location, for example UT-12345 (FL):
- Prefix: state of issue. The state office that granted the license. Utah, Pennsylvania, and California issue most bedding licenses in the nation.
- Core: manufacturer ID code. The unique serial registration number assigned to the corporate manufacturing entity. This number remains permanent across all product model years.
- Suffix: plant location. A state code in parentheses showing where workers built the bed.
What the URN proves and does not prove
What it proves. The URN ties a mattress to a specific registered plant that state officers inspect, and it gives officials a code to trace a defective fire barrier back to the facility that made the bed.
What it does not prove. The URN does not tell you what a mattress is made of, how it feels, or how long it will last. Material disclosure lives on the filling list, not in the registry number, and a valid URN is not a quality or safety rating on its own.
IABFLO reciprocity: which states accept which labeling
State bedding officials coordinate law tag rules across the country through IABFLO. As of the review date shown on this page, 31 states share the same bedding inspection rules:
Reciprocity is a point-in-time count, not a permanent guarantee. Membership and individual state rules can change, so treat the number as the current baseline rather than a fixed figure.
- One license code. Registering in one state lets a factory sell in all 31 states with one legal tag.
- Yearly factory inspections. State inspectors check factories to verify clean materials and sanitary conditions.
- Safe recalls. If a fire barrier is defective, state officials use the URN code to trace and recall the beds.
Tag color classification: white, yellow, and red
A law tag color is a regulatory classification, not a style choice. Each color carries a different legal meaning:
- White tag: All New Material. Indicates 100 percent virgin raw materials. Every brand-new retail mattress delivered to a consumer must legally carry a white tag.
- Yellow tag: Sanitized Renovated. Legally required when a returned mattress is rebuilt, sanitized, or fitted with a replacement cover for secondhand resale.
- Red tag: Non-Compliant Seized. Put on by state inspectors during plant audits. It legally blocks sales due to false labels or failed fire tests.
Certificate glossary
| Certificate | Applies to | What it verifies |
|---|---|---|
| GOTS Organic Cotton | Cover and quilt fabric | Verifies that the cotton is grown naturally without toxic pesticides, weed killers, or synthetic chemicals (License ONE-3420). |
| CertiPUR-US Certified | Polyurethane and visco foams | Certifies that the foam is made without toxic chemicals, lead, heavy metals, or ozone depleters. |
| GREENGUARD Gold | Indoor air quality | Meets UL 2818 standards for low chemical and particle emissions into indoor air. |
| OEKO-TEX Standard 100 | Latex and textile fibers | Tests against more than 300 harmful chemicals and qualifies for Class I, the strictest category for direct skin contact. |
| 16 CFR 1633 Flammability | Federal fire safety | Passes the mandatory 30-minute open-flame and cigarette-smolder ignition test. |
| CA AB 1059 Compliant | Fiberglass-free status | Law tag review found zero glass components in the tags we checked. |
These are the certificates and compliance marks most often cited on U.S. mattress listings. Each one covers a specific, limited claim:
A glossary entry describes the component a certificate covers, not a blanket endorsement of the whole mattress. Read each mark together with the law tag and the filling list.