Polarized light microscopy (PLM) and scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS) were used to identify crystalline glass fibers in environmental wipe samples.
California state toxicologists audited 28 budget direct-to-consumer memory foam mattresses using polarized light microscopy to analyze the migration of glass fibers when zippered covers are opened.
Contains zero crystalline glass; generates zero respirable airborne fibers even under heavy physical abrasion.
Brittle glass filaments fragment under mechanical movement, shedding sharp needles through woven cover fibers.
100% of mattresses utilizing glass-reinforced inner fire socks released microscopic glass shards (30 to 50 microns wide) into indoor air, contaminating HVAC systems, carpeting, and clothing.
Never buy a mattress that contains fiberglass in its fire sock. If your current mattress has a zipper, never open or wash the cover. Look for mattresses that use certified non-glass barriers like hydrated silica or wool.
Recommended Firmness Target: Any Firmness (Check Fire Barrier Tag)
Always read the law label under 'Inner Cover' or 'Fire Barrier'. Reject any product listing glass fiber, glass wool, or glass filament.