Casper Sleep Essential Mattress Topper
Lower risk than coated fabrics, but contact Casper to confirm no finishing chemicals.
This foam topper is mostly polyurethane, which doesn't inherently need PFAS. Casper keeps quiet about all treatment details, though foam rarely contains PFAS on its own.
We flunk more products than we pass. This one earned its grade. How we grade
Material
polyfoam/polyurethane foam topper
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Volatile organic compound (VOC) off-gassing
Polyurethane foam releases VOCs during manufacturing curing and continues to emit them for weeks to months after production, especially when new. Off-gassing intensity depends on manufacturing standards and ventilation; Casper does not disclose VOC test results or limits, so baseline exposure is unknown.
Microplastic shedding
Polyfoam mattress toppers naturally fragment and shed microparticles as the foam cells break down, particularly with use and pressure. This contributes to indoor dust and potential inhalation or ingestion, a hazard that increases over the product lifespan.
Flame retardants
Casper does not specify which flame retardants (if any) are used in the Essential topper. Polyfoam may rely on inherent char properties or may contain brominated, chlorinated, or phosphorus-based additives; without disclosure, chemical risk cannot be evaluated.
Source, EPA ↗Moisture and mold accumulation in use
Polyfoam readily absorbs and retains moisture if exposed to humid conditions or spills. Standing moisture can promote mold and bacterial growth, especially if the topper is not regularly aired or replaced, degrading both chemical safety and hygiene.
Accelerated degradation under heat
Polyfoam degrades faster when exposed to sustained warmth (heated beds, direct sunlight, or high ambient temperature). Accelerated breakdown increases both microparticle release and potential reactivation of off-gases from partially decomposed polymer chains.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
The full breakdown
What it's made of and why it matters
The Casper Essential Topper is polyurethane foam (polyfoam), a petroleum-derived cellular plastic that provides cushioning through air-filled pockets. Polyfoam inherently sheds microparticles over its lifespan and can off-gas volatile organic compounds (VOCs) during initial use, particularly when new. Unlike latex or memory foam treated with flame retardants, polyfoam relies on its chemical structure for fire resistance, reducing but not eliminating chemical additive concerns. The material itself is stable once cured, but degradation accelerates with heat, moisture, and UV exposure.
The brand's record and disclosure
Casper does not publicly disclose ingredient lists, flame retardant chemistry, or PFAS content for its foam products, despite marketing the Sleep Essential line as an affordable entry product. The brand holds no third-party certifications (CertiPUR-US, OEKO-TEX, or Global Organic Textile Standard) that would validate chemical safety claims. No major recalls or safety controversies are on record for Casper toppers, but the company's silence on formulation details makes independent verification impossible. This lack of transparency is typical for budget mattress brands but contrasts with premium competitors that publish material disclosures.
How it compares in its category
Polyfoam toppers occupy the mid-risk space in the topper category. They off-gas more noticeably than latex alternatives (which emit minimal VOCs) but typically less intensely than memory foam toppers treated with brominated or chlorinated flame retardants. Budget polyfoam products like the Essential often skip the certifications that mid-range competitors use to signal chemical safety, making direct comparison difficult. Gel-infused or hybrid toppers may introduce silicone additives with their own off-gassing profiles, so polyfoam is not automatically the worst choice, only the least transparent in this price tier.
If you buy it
Air out the topper in a well-ventilated room (ideally outdoors) for 24-72 hours before use to minimize VOC exposure during the off-gassing phase. Avoid stacking it or using it in sealed, humid spaces, as trapped moisture accelerates foam degradation and mold risk. Keep it away from direct heat sources and sunlight to slow breakdown of the foam structure. Replace the topper every 3-5 years or sooner if you notice flattening, tears, or persistent odor; deteriorating foam sheds microparticles more aggressively.
What we don’t know
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Casper has made none
Formulations change between production runs, so check the current label. How we grade.
More mattress protectors grades
How we score, every product runs through the same public 0-100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.