Casper · Stain-Resistant Bed Sheets
Casper Hyperlite Full Sheet Set 100% Tencel Lyocell White Cooling
Lower PFAS concern; Tencel Lyocell is inherently low-risk but no brand transparency on finishing treatments.
Casper's Hyperlite sheet set is made from Tencel Lyocell, a regenerated cellulose fiber that does not require PFAS in its core manufacture. However, the brand provides no public disclosure about water-repellent coating (water-repellent coating) or stain-resistant finishes applied during production.
Shop Casper on Amazon →Material
100% Tencel Lyocell (regenerated cellulose fiber)
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
Tencel Lyocell is a regenerated cellulose fiber made via closed-loop solvent processing, which means raw wood pulp is dissolved and re-spun with solvent recovery rates typically above 99 percent. This production method is inherently cleaner than conventional viscose or polyester, reducing exposure to residual toxic chemicals in the finished fiber. The white color and cooling claim suggest minimal dye load and likely synthetic cooling additives (e.g., phase-change microcapsules or moisture-wicking finishes) rather than chemical coatings. 100 percent Tencel means no synthetic blends that could introduce antimony or other polyester-associated contaminants.
The brand's record and disclosure
Casper does not publicly disclose testing for formaldehyde, heavy metals, or PFAS finishing chemicals on their sheet products, and no third-party certifications (OEKO-TEX, GOTS, Cradle to Cradle) are listed for this line. The brand has not faced documented recalls or safety controversies specific to textiles, but silence on chemical transparency is standard for mainstream sleep brands and reflects limited regulatory pressure rather than exceptional safety. Casper's focus is marketing and comfort rather than chemical disclosure.
How it compares in its category
Tencel Lyocell sheets are positioned in the mid-to-premium segment and typically carry lower inherent chemical risk than 100 percent cotton (which can have high pesticide residues if not organic) or polyester blends (antimony, azo dye concerns). Compared to other Tencel lines or certified organic cotton sheets, Casper's lack of third-party certification is a downgrade; however, the material itself is safer than most conventional synthetics or rayon viscose. Cooling sheets as a category often use non-toxic moisture-management additives, so the 'cooling' claim does not raise red flags.
If you buy it
Wash before first use to remove any residual finishing chemicals and loose dyes. Use warm or cool water (not hot) and mild detergent; high heat in dryer accelerates fiber breakdown and any potential leaching of finish treatments. Replace after 2-3 years of regular use or when pilling, color fading, or elasticity loss becomes pronounced. Line dry or low-heat dry to maximize lifespan and minimize off-gassing of any volatile finish residues.
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 resins (durable-press or crease-resistant finishes)
Tencel Lyocell sheets often receive wrinkle-resist or shape-memory finishes that may include formaldehyde-releasing resins; Casper does not disclose finish composition. Formaldehyde release typically declines with washing but can persist in poorly ventilated storage.
Azo dyes and heavy metal pigments in white colorant
White sheets require minimal dyeing; however, optical brighteners (typically fluorescent whitening agents) or residual metal catalysts from Tencel production are possible. No recalls or published test failures for Casper Tencel products exist, and Tencel's closed-loop process minimizes residual metallics.
Cooling additives (phase-change microcapsules or moisture-wicking treatments)
Cooling finishes used in performance sheets are not regulated as hazardous and commonly employ inert paraffin or silicone-based microencapsulation. No brand testing or incident reports link Casper cooling sheets to skin irritation or chemical leaching.
Flame retardants
Bed sheets are not subject to federal flammability standards in the US (unlike mattresses or children's sleepwear), so flame retardants are not typically applied. No evidence that Casper adds flame retardants to this line.
Volatile organic compound (VOC) off-gassing from finishes
New Tencel sheets may emit low levels of residual solvents or finish volatile compounds for the first few washes, particularly if stored in warm or humid conditions. Off-gassing is short-lived and minimized by pre-washing and airing before use.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 82% 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.