Casper · Stain-Resistant Bed Sheets
Casper Hyperlite Cooling 100% Lyocell White Blanc 4pc KING Sheet Set. New!
Lower PFAS concern; lyocell sheets typically untreated, but verify if any stain-resistant finish applied.
Casper's Hyperlite sheet set is made from 100% lyocell, a cellulose fibre with no inherent PFAS risk. No water-repellent, stain-resistant, or antimicrobial finish is mentioned in the product name.
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100% lyocell (cellulose fibre)
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
furniture is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
This product is 100% lyocell, a regenerated cellulose fiber made by dissolving wood pulp in a chemical solvent and re-spinning it. Lyocell (branded Tencel when made by Lenzing) is closed-loop manufactured, meaning 99% of solvents are recovered and recycled, resulting in minimal residual chemical burden in the final fiber. The fiber itself is free of synthetic polymers, dyes, or coatings inherent to polyester or cotton-blend alternatives. The advertised "stain-resistant" claim on THIS product is not yet confirmed by available public specifications; clarification is needed on whether a chemical finish (potentially PFAS-based) has been applied post-manufacture.
The brand's record and disclosure
Casper is a direct-to-consumer sleep brand without published certifications (OEKO-TEX, GOTS, bluesign) or detailed chemical disclosure on their website. The brand has not publicly committed to PFAS avoidance or published restricted substance lists. No major safety recalls or regulatory actions against Casper bedding are on record. Given the silence on how the "stain-resistant" finish is achieved, contacting Casper customer service to confirm the absence of PFAS or other water-repellent coating treatments is prudent before finalizing purchase.
How it compares in its category
Pure lyocell sheets sit at the lower end of chemical hazard risk compared to polyester-cotton blends (which may contain antimony catalysts, azo dyes) or heavily treated "performance" fabrics. However, without certification, this Casper set lacks the transparency of OEKO-TEX Standard 100 certified sheets, which screen for 300+ harmful substances including heavy metals and formaldehyde. Premium competitors (e.g., Parachute, Brooklinen) publish third-party test results; Casper does not, making direct comparison difficult.
If you buy it
Wash new sheets 1-2 times before use to reduce any loose dye or finish residue. Lyocell is durable to 40°C (104°F) water temperature; avoid hot water and high heat drying to preserve fiber and prevent any finish degradation. If stain-resistant finish is present and contains fluorinated compounds, repeated washing will gradually diminish efficacy (normal for PFAS-free finishes). Monitor for skin irritation; discontinue use and launder again if sensitivity occurs.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Formaldehyde releasers in dyes or finishes
No formaldehyde-release findings are on record for Casper sheets. Lyocell's closed-loop process and cellulose base reduce this risk versus synthetic fibers, but lack of third-party testing means residual dye cross-linkers cannot be ruled out.
Azo dyes and heavy metal pigments
The white color of this set minimizes azo dye risk, but dye manufacturing and finishing chemistry are not disclosed. No OEKO-TEX or GOTS certification is claimed, so restricted heavy metals (lead, cadmium, chromium) in dyes are not independently screened.
Antimony in synthetic components
100% lyocell eliminates antimony catalyst risk present in polyester or polyester-blend sheets. Lyocell fibers do not use antimony in manufacture.
water-repellent coating finish composition (non-PFAS specified)
The product is marketed as stain-resistant, but Casper has not published whether this uses PFAS, silicones, or alternative chemistry. PFAS finishes on textiles persist through washing and may shed microfibers; non-PFAS alternatives exist (e.g., silicone, wax-based) but confirmation is unavailable without direct contact.
Microplastic shedding from finish degradation
If a synthetic finish is applied, repeated laundering will eventually degrade it, potentially releasing microfibers. Lyocell itself does not generate microplastics, but any polymer coating applied post-spin could.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 78% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Stain-Resistant Bed Sheets
Boll & Branch
Signature Hemmed Sheet Set
100% organic cotton
Lower-concern choice; organic cotton sheets with credible third-party backing and explicit PFAS-free positioning.
✓Verified PFAS-free by a third party
Boll & Branch
Signature Hemmed Sheet Set
100% cotton sateen
Lower concern; certified PFAS-free cotton sheets from a transparency-focused brand.
✓Verified PFAS-free by a third party
Boll & Branch
Signature Fitted Sheet
100% organic cotton
Lower-concern choice, organic cotton with third-party verified PFAS avoidance.
✓Verified PFAS-free by a third party
More stain-resistant bed sheets 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.