U.S. Consumer Product Safety Commission (CPSC)
Consumer Product Safety Alert: Fiberglass in Mattresses
CPSC Safety Alert
Can You Wash a Mattress Cover If It Has a Zipper?
Explains the difference between manufacturing zippers and consumer washable covers, and fiberglass exposure risks.
Warning: Check Law Tag First
Direct answer summary
Do not unzip or wash a mattress cover simply because it has a zipper. In many memory foam and hybrid mattresses, zippers are installed strictly for factory assembly. Unzipping a cover on a bed containing an inner fiberglass flame sock will rip the fragile glass knit, releasing millions of microscopic glass shards into your home. Always check the law label: unless it explicitly states 'Removable and Washable Cover', leave it sealed.
Key points
Zippers are frequently installed for factory assembly only and are not meant for consumers.
Unzipping a mattress with an internal glass fiber sock causes severe home contamination.
Always use an external waterproof mattress protector rather than washing the manufacturer's cover.
Interactive example
Explore an example related to this answer.
Verified Law Label
Interactive Visual Tool
Law Label & Material Audit
Inspect the physical law label tag, decode the state Uniform Registry Number (URN), and review certified material percentages under CPSC 16 CFR Part 1633.
What the law tag tells you
Uniform Law Label & Material Deconstruction
Under FTC 16 CFR Part 303 and IABFLO uniform law label standards, bedding manufacturers must disclose exact net filling weights using standardized generic fiber terms. Marketing buzzwords are prohibited under federal penalty.
▲ Sewn Into Seam (Tyvek Substrate) ▲
UNDER PENALTY OF LAW THIS TAG NOT TO BE REMOVED EXCEPT BY THE CONSUMER
ALL NEW MATERIAL CONSISTING OF
POLYURETHANE FOAM PAD55%
RESIN-TREATED COTTON BATTING25%
RAYON FIBER / WOOL CHAR BARRIER20%
Net Filling Weight (Excluding Steel Springs)
Uniform Registry Number (Click to decode)
REG. NO. UT-12345 (FL)
Certification is made by the manufacturer that the materials in this article are described in accordance with law.
Manufacture Date:04/2026
Plant Facility:Tampa, FL
Legal Entity:Saatva Inc. / Bedding Industries of America (BIA)
16 CFR Part 1633 Prototype: STV-115-HYB-2026Inspect →
Physical Tag Dimensions: 2.75" × 3.75" (Meets IABFLO 2.5" × 3.0" min)
What the tag number means
REG. NO. UT-12345 (FL)
Issuing State
UT (Utah)
Registry Sequence
#12345
Plant Location
FL (Florida)
IABFLO 31-State Reciprocity: The issuing state (UT) participates in the Uniform Law Label system. This single registration permits lawful commercial distribution across all 31 regulated US bedding jurisdictions without duplicate state tags.
Specifications
Recorded specifications
Values and benchmarks recorded for this question.
| Specification | Measured value | Benchmark | Status |
|---|---|---|---|
| Zipper Purpose | Factory Assembly Enclosure Only | Consumer Removable Only if Stated | warning |
| Fiberglass Hazard on Unzipping | Extreme Contamination Risk | Zero Mineral Fiber Exposure | warning |
| Cleaning Best Practice | Spot Clean Only with Damp Cloth | Surface-Only Maintenance | pass |
| Protective Solution | External Washable Mattress Protector | Full Waterproof Defense | pass |
Standards reference: Benchmarks derived from ASTM D3574 (flexible cellular foam), CPSC 16 CFR 1633 (open flame flammability), and clinical capillary closing thresholds (32.0 mmHg).
Checklist
Consumer Safety & Chemical Verification Protocol
Step-by-step physical inspection procedure for flame barrier integrity and law label compliance.
- 01
Check Law Tag Instructions
Read the care instructions on the permanent Tyvek tag before touching the zipper.
Watch for: NEVER UNZIP A COVER THAT SAYS 'DO NOT REMOVE' OR 'SPOT CLEAN ONLY'.
- 02
Inspect Fiber Composition
Confirm whether the filling contains glass fiber, silica sock, or modacrylic.
Watch for: Never put an unzipped manufacturer mattress cover into a residential washing machine.
- 03
Fit a Washable Protector
Install an external, OEKO-TEX certified waterproof protector with its own zipper.
Watch for: Do not wait for spills or stains to occur before buying a protector.
Sources
Sources for this answer
Read the source documents behind the thresholds, measurements, and policy details used here.
View source
Federal Trade Commission (FTC)
Care Labeling Rule for Apparel and Certain Piece Goods
16 CFR Part 423