Brooklyn Bedding · Mattress Protectors
Brooklyn Bedding Mattress Encasement, Twin
Lower concern for standard encasement without known water-repellent coating treatment.
This standard fabric encasement lacks marketed water-resistance or stain-guard treatments, the primary PFAS vectors in bedding. The brand makes no PFAS disclosures.
We flunk more products than we pass. This one earned its grade. How we grade
Material
polyester/cotton blend mattress encasement with standard zipper
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.
Formaldehyde / VOCs
Standard polyester-cotton textiles may be finished with formaldehyde-based resins for wrinkle resistance or dye fixation. No third-party testing disclosed for this product; risk is typical for mid-market unverified textiles but not elevated beyond the category.
Source, ATSDR ↗Antimony in polyester fiber
Polyester fibers are sometimes synthesized using antimony catalysts; residual antimony can leach in trace amounts. No specific testing for this encasement is public. Exposure via direct skin contact is low, and washing typically reduces residual levels.
Microplastic shedding during washing and use
All synthetic textiles shed microfibers when washed or abraded. A polyester-rich encasement will contribute to this; using a wash bag and avoiding high-heat drying minimizes but does not eliminate the effect. Concern is environmental and long-term cumulative rather than acute personal health.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Heavy metals
No recalls or public reports of heavy metal contamination in Brooklinen mattress encasements. Standard textile dyes are regulated in developed supply chains, though unverified sourcing leaves the possibility open. Direct skin contact is low-risk compared to products with repeated skin exposure.
Source, FDA ↗Zipper corrosion and metal leaching
Standard metal zippers used in textiles are typically nickel-plated brass or aluminum alloy. Corrosion is unlikely under normal laundering; any leaching would be negligible. No specific issues reported for this product.
The full breakdown
What it's made of and why it matters
This encasement is a polyester-cotton blend, a common choice for mattress protectors because the blend balances breathability (cotton) with durability and moisture resistance (polyester). Polyester does not inherently contain problematic heavy metals or endocrine disruptors in standard production, though the dyeing and finishing processes can introduce risks. The zipper is standard metal hardware with no known special coating. No waterproofing treatment (which would trigger PFAS concern) is standard for basic encasements; water resistance here comes from the tightly woven fabric itself.
The brand's record and disclosure
Brooklinen (parent company Helix Sleep) does not publicly disclose detailed chemical testing or third-party certifications (such as OEKO-TEX or GOTS) for this specific product on widely available materials. The brand has no known recalls or public safety controversies tied to mattress encasements. Transparency on textile sourcing and dye chemistry is limited compared to premium eco-focused competitors; no formal PFAS avoidance statement is on record.
How it compares in its category
Basic polyester-cotton encasements are the standard in the mid-market mattress protector category and carry similar risk profiles. Premium alternatives (organic cotton or OEKO-TEX certified) offer more verification of dye safety and chemical limits. Budget alternatives using 100% polyester may off-gas more VOC. Brooklinen's offering sits in the mainstream middle, no obvious red flags, but also no third-party verification of restricted substance limits.
If you buy it
Wash the encasement before first use to remove residual finishes and dyes. Machine wash in warm water with gentle detergent; avoid bleach or fabric softeners. Do not machine dry on high heat, as sustained high temperature can degrade polyester fibers and potentially accelerate microplastic shedding. Replace if zipper fails, seams separate, or the fabric develops persistent odors after washing, as these indicate loss of protective function. Inspect annually for wear.
What we don’t know
- Basis
- Model estimate, 68% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Brooklyn Bedding 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.