Current Sweetnight mattresses are marketed as fiberglass-free, but older models contained it and a 2026 CPSC report alleges shedding from a Sweetnight king. Here is the model-by-model picture.
If you are shopping Amazon for a budget mattress, Sweetnight is one of the brand names you will hit fastest. The fiberglass question follows the brand because Sweetnight, like other low-cost foam manufacturers, used a fiberglass fire sock under the cover for years. Here is the current 2026 picture, separated from the marketing copy.
No. Sweetnight officially states their entire current lineup of mattresses and toppers is fiberglass-free, and the brand markets a "fiberglass-free" claim across its product pages and FAQ. CertiPUR-US certifies the foams used for chemical emissions and content, but CertiPUR-US does not test fire barriers, so the fiberglass-free claim rests on Sweetnight's own disclosures rather than third-party fire-barrier testing.
That said, two caveats are worth knowing before you buy:
Federal flammability standard 16 CFR Part 1633 requires every mattress sold in the United States to resist open-flame ignition for 30 minutes. Manufacturers can comply with chemical flame retardants, an inherently flame-resistant fiber like rayon or wool, or a fiberglass fire sock - a thin woven barrier wrapped around the foam core under the outer cover.
Fiberglass is the cheapest of those options, which is why imported budget brands sold through Amazon (Zinus, Linenspa, Lucid, Vibe, Olee Sleep, and earlier-era Sweetnight) defaulted to it. The risk is well-documented: when an owner unzips the outer cover to wash it - something many of these covers explicitly invite - the fiberglass barrier ruptures and microscopic glass fibers contaminate the bedroom, HVAC, and adjacent rooms, sometimes triggering remediation costs in the five figures.
Sweetnight has not published a detailed fire-barrier composition for the current lineup. Brand and retailer copy across the CoolNest, Twilight, Sunkiss, and Whisper models references a "knit fabric" cover with the foam or hybrid coil core beneath, and Sweetnight's blog post on fiberglass-free construction points to "alternative fire-resistant materials" without naming the specific fiber.
In the absence of disclosure, two reasonable inferences:
These are the active models you will see on Amazon and sweetnight.com today:
NapLab's 395-mattress fiberglass database marks the following older Sweetnight models as discontinued with fiberglass status unmarked: Dreamy, Dreamy Hybrid, Prime, and Starry Night. If you own one of these, treat it as potentially containing fiberglass and do not unzip the cover.
Order matters. Do these in sequence and stop as soon as you have an answer:
For a budget Amazon-tier mattress, current-production Sweetnight is a reasonable pick if you want fiberglass-free construction at the $400-$500 queen price point. Trade-offs to know:
If you want truly transparent fire-barrier disclosure, the brands with public statements naming the specific non-fiberglass material are Saatva (rayon-silica plus wool), Avocado (wool), and Brooklyn Bedding's Spartan and Aurora lines. Those start around $1,000 queen, which is the price gap budget brands like Sweetnight are filling.
Sweetnight states all current mattresses and toppers are fiberglass-free. The brand uses an unspecified alternative fire-resistant material. Older Sweetnight models (Dreamy, Prime, Starry Night) sold before the policy change may contain fiberglass.
No class action has been filed against Sweetnight as of May 2026. A single consumer report (CPSC #20260204-6443C) filed in February 2026 alleges fiberglass shedding from a Sweetnight SN-M004-K king mattress, but it remains an individual report, not litigation.
Read the law tag on the side seam - fiberglass content must be listed there as 'Glass Fiber' or 'Fiberglass.' Then check your model number against Sweetnight's official support article and NapLab's fiberglass database. Do not unzip the inner cover to inspect; that is what releases fiberglass when present.
No. CertiPUR-US certifies foam content and emissions only. It does not test fire barriers. A CertiPUR-US certified mattress can still contain a fiberglass fire sock under the cover. Fiberglass-free is a separate claim that depends on the brand's fire-barrier disclosure.
Sweetnight's listings include a 'do not remove inner cover' instruction even on current fiberglass-free units. Unzip only the outer washable cover if one is provided. Do not open the inner cover - that is the layer the fire barrier sits beneath.
Compare current-production options with documented fire-barrier disclosure before committing to a budget Amazon brand.
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Banner Mattress EditorialThe Banner Mattress editorial team publishes independent mattress reviews, buying guides, and sleep-health advice. Since 2018 we've tested 1,000+ mattresses and 3,000+ pillows, sheets, and bedding accessories in our review lab - every recommendation is hands-on, never sourced from vendor talking points. Affiliate links may earn us a commission, but never change what we recommend.
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