3L OS Nook Jacket - White - L / M
Avoid until the brand confirms water-repellent coating chemistry or offers PFAS-free alternatives.
This 3-layer technical shell jacket almost certainly uses a water-repellent coating finish to shed moisture, a common PFAS source in outdoor apparel. The brand provides no disclosure on PFAS content or water-repellent coating chemistry.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Synthetic outer shell with likely water-repellent coating water-repellent coating (unspecified)
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
You may also be interested in
Top-graded picks in the categories readers replace first, every one scored on the same rubric.
- polypropylene filter housing, carbon/sediment cartridge
- We found no PFAS statement from the brand
- Bacterial growth in spent cartridges
3 hazards checked on this product, all on its full breakdown.
Aquasure
Premier Series 75 GPD Under Sink Reverse Osmosis Water Filtration System
- RO membrane, carbon filters, stainless steel housing
- We found no PFAS statement from the brand
- Bacterial and microbial growth in housing and filters
4 hazards checked on this product, all on its full breakdown.
Avocado
Vegan Mattress
- organic cotton, natural latex, coconut coir, recycled steel coils
- The brand calls it PFAS-free, which we have not verified
- Heavy metals
2 hazards checked on this product, all on its full breakdown.
What 3L OS Nook Jacket - White - L / M is made of, ingredients and materials
The OS Nook Jacket uses a synthetic outer shell (material type unspecified by the brand in available documentation) paired with a water-repellent coating (water-repellent coating) finish. water-repellent coating coatings on outdoor apparel historically rely on PFAS "forever chemicals" (PFAS) to achieve water-shedding properties, though some manufacturers have switched to non-fluorine alternatives. The brand has not publicly disclosed the water-repellent coating chemistry or offered fluorine-free variants, leaving the PFAS content unverifiable.
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.
PFAS
The brand has not disclosed water-repellent coating chemistry; unspecified fluorine-based repellents are standard in this product category and price tier. PFAS accumulates in body tissues and the environment, and no exposure threshold has been established below which health effects are not observed.
Source, ATSDR ↗Formaldehyde / VOCs
Synthetic outer shells and linings may contain formaldehyde-based wrinkle-resist or flame-retardant finishes, especially in seam tape and adhesives. No certification (e.g., OEKO-TEX, Bluesign) or materials disclosure from mitigates this risk.
Source, ATSDR ↗Heavy metals
White synthetic jackets typically use TiO2 or other pigments for opacity; The brand does not publish dye source or heavy metal (lead, cadmium, chromium) testing. Synthetic dyes may also include azo compounds restricted in EU and key apparel markets but not uniformly enforced globally.
Source, FDA ↗VOC off-gassing from synthetic shell and adhesives
New synthetic jackets commonly emit volatile organic compounds from the polymer film, seam tape adhesives, and finish treatments. Off-gassing typically peaks in the first few weeks; The brand provides no ventilation guidance or low-VOC certification.
Microplastic shedding during wear and wash
Synthetic outer shells shed microfibers during abrasion and laundering. While not a direct toxicity hazard to the wearer, accumulated microplastics enter waterways and food chains; no mitigation strategy (e.g., guppy-trap laundry bag recommendation) is documented by the brand.
How is this PFAS grade calculated?
The brand's record and disclosure
The brand is a Swiss ski equipment manufacturer with limited public transparency on chemical safety, restricted disclosure statements, or third-party material certifications in available sources. No recall history, hazardous substance commitments, or independent lab testing for this model has been published. The brand does not advertise PFAS-free or low-PFAS product lines, suggesting no systematic effort to phase out legacy water-repellent coating chemistry.
How it compares in its category
Most mid-range ski jackets still rely on PFAS-based water-repellent coating, making the OS Nook typical rather than exceptional. However, competing brands (e.g., Patagonia, The North Face, Arc'teryx) have begun labeling PFAS-free or using Bluesign-certified suppliers with restricted chemical lists. The brand's silence on material sourcing or environmental standards places it below leaders in the transparency category.
If you buy it
Minimize direct skin contact by wearing base layers underneath; PFAS primarily migrates during manufacturing and wear, not through brief handling. Wash sparingly in cool water without heavy detergent, as agitation and heat can degrade the water-repellent coating and potentially increase leachate mobilization. Do not machine dry or expose to high heat, which accelerates synthetic fiber degradation. Replace the jacket if the water-repellent coating fails visibly (water beads no longer form), as reapplication products may introduce additional chemicals.
What is not known about PFAS in this product?
- Basis
- Model estimate, 45% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- has made none
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to 3L OS Nook Jacket - White - L / M?
- Wool blend with synthetic fill (likely polyester)
- We found no PFAS statement from the brand
- water-repellent coating (water-repellent coating) coating composition
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
Allbirds
Jackets & Coats Allbirds Men's Trino Puffer Jacket Full Zip Wool Blend Forest Green Coat Size Sm
- wool blend (natural fiber dominant)
- We found no PFAS statement from the brand
- water-repellent coating (water-repellent coating) treatment - undisclosed chemistry
2 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- Merino wool blend (natural fiber)
- We found no PFAS statement from the brand
- Azo dyes and synthetic dye residue
3 hazards checked on this product, all on its full breakdown.
Find an alternative on AmazonMore ski & snowboard jackets 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.