nectar mattress encasement super king size new, Is It Non-Toxic?
Avoid until the brand discloses waterproof treatment chemistry.
This polyester encasement is marketed as waterproof but the brand does not disclose what chemicals achieve that water resistance. Mattress protectors frequently rely on PFAS-based water-repellent coating treatments.
The better-graded swap
Avocado Green Mattress
Organic Cotton Mattress Pad Protector
85/100 safety
Same rubric that flunked this product. The swap earned Excellent.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Polyester/polyurethane encasement with water-resistant treatment
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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Is nectar mattress encasement king size new non-toxic? What it is made of
This Nectar encasement is polyester fabric with polyurethane backing and a water-resistant treatment applied to the surface. The water-resistant layer is the critical unknown, Nectar has not publicly disclosed whether this uses PFAS-based water-repellent coating (water-repellent coating) or alternative chemistries. Polyester itself is stable and non-toxic when undamaged, but the proprietary finish on this product is where chemical risk concentrates. The backing and seams may also contain adhesives or coatings not itemized in marketing materials.
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.
Waterproof / stain-resistant treatment
Water-repellent coating treatments have historically used PFAS.
Water-resistant chemical composition (undisclosed)
Nectar has not disclosed the water-repellent coating chemistry used on this encasement. Industry standard for polyester mattress protectors historically defaults to PFAS-based finishes unless explicitly stated otherwise. This product carries the categorical risk of PFAS exposure (graded separately at 30/100) without transparency to support alternatives.
Polyurethane backing degradation
Polyurethane foam or film backing can break down over 3-5 years, especially if exposed to heat, moisture, or UV. Degradation may release small polymer particles and can compromise water resistance. No manufacturer data on lifespan or degradation products available for this model.
Microplastics
Polyester encasements shed microfibers during washing and use, particularly if the surface treatment is damaged. This is inherent to the material class but not specific to Nectar; gentle washing and air drying minimize release. The undisclosed finish may accelerate or slow shedding depending on its chemistry.
Source, EPA ↗Flame retardants
If the underlying mattress uses older brominated or chlorinated flame retardants, the encasement may not fully isolate them but can reduce dust and vapor contact. This is a benefit of the barrier, not a hazard from the encasement itself, but effectiveness depends on fit and seal integrity.
Source, EPA ↗What’s reassuring
Adhesives and seam treatments
Polyurethane-based adhesives used in seam bonding are not typically a major hazard if fully cured before purchase, but Nectar does not disclose cure time or adhesive type. No recalls or complaints specific to seam off-gassing for this product are on record.
How is this PFAS grade calculated?
The brand's record and disclosure
Nectar Sleep does not publish material safety data sheets, PFAS testing results, or certifications (OEKO-TEX, GOTS, etc.) for this encasement. The brand has not responded publicly to growing questions about PFAS in mattress protectors, and their website does not list waterproof treatment ingredients. This silence is a red flag in a product category where PFAS-free alternatives are increasingly marketed. Without third-party certification or direct disclosure, buyers cannot verify chemical safety.
How it compares in its category
Many competitors (Saatva, Helix, Casper) now explicitly market PFAS-free encasements or carry OEKO-TEX Standard 100 certification. Budget alternatives often use the same polyester-polyurethane design but may carry fewer hazards if they use certified treatments. Nectar's silence puts it below the transparency standard of the mainstream market; premium brands have largely moved to non-fluorinated water-repellent coating or mechanical water resistance. Price point does not reflect any documented safety advantage.
If you buy it
Wash the encasement once before use to remove any loose finish; use warm (not hot) water and air dry to avoid degrading the backing. Do not expose to prolonged heat (direct sunlight, steam cleaning, or dryers above 130F) as polyurethane can soften and shed microplastics. Inspect seams and backing annually for peeling or cracking; replace if waterproof layer visibly deteriorates. Keep away from prolonged contact with mattress chemicals (flame retardants) by ensuring proper mattress ventilation underneath.
What is not known about PFAS in this product?
- Basis
- Model estimate, 42% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Nectar has made none
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to nectar mattress encasement super king size new?
- organic cotton
- We found no PFAS statement from the brand
- No PFAS statement found from the brand
- Organic cotton
- We found no PFAS statement from the brand
- Waterproofing chemical exposure
2 hazards checked on this product, all on its full breakdown.
- 100% linen, no reported coating
- We found no PFAS statement from the brand
- Heavy metals
3 hazards checked on this product, all on its full breakdown.
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.