Suunto Review, Is Suunto Non-Toxic?
Across 17 graded products, Suunto averages Excellent (85/100). On disclosure, the brand says nothing publicly about PFAS. 17 of its products grade Good or better. Grades are model-based estimates, not lab results.
PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Grades are model-based, built from published ingredients, materials, certifications, brand disclosures and third-party lab results where they exist. See the rubric.
Does Suunto have PFAS, by category
Worth buying from Suunto Good or better, best-graded first
Suunto
Smart Sensor
Electronic sensor, materials unspecified
Coating degradation and leachates from unspecified housing materials
Without disclosed housing material or protective coatings, prolonged skin contact or…
Heavy metals
Wearable electronics routinely contain lead-tin solder, lithium batteries, and trace…
Skin irritation from contact allergens in unspecified materials
If housing contains nickel-plated contacts or rubber accelerators in silicone bands…
Volatile organic compounds (VOCs) off-gassing
New electronics may release trace VOCs from potting compounds and adhesives during the…
Insufficient data for reliable PFAS assessment.
⚠Brand says nothing about PFAS
Suunto
Women's Core Smartwatch Band Loop
elastomer loop strap, likely silicone or rubber
Elastomer degradation and surface breakdown
Prolonged UV exposure, heat, and sweat can cause silicone or rubber to become tacky…
Bacterial and fungal colonization
Elastomer straps trap moisture and sweat; inadequate cleaning allows bacterial biofilm…
Metal component corrosion (buckle or attachment points)
If the loop strap includes a metal clasp or attachment hardware, salt sweat and chlorine…
Lower concern; elastomer loop unlikely to contain intentional PFAS.
⚠Brand says nothing about PFAS
Suunto
Silicone Breathable Band
Silicone elastomer
Silicone leachables (oligomers, cyclic siloxanes)
Silicone elastomers can release small molecular-weight oligomers during manufacture or…
Bacterial or fungal growth (skin contact surface)
Any worn elastomer can harbor Staphylococcus or Candida if not cleaned regularly; the…
Contact dermatitis or allergic sensitization
Silicone is hypoallergenic in most users, but individual sensitivity to residual…
Silicone elastomer band shows lower PFAS concern based on material type.
⚠Brand says nothing about PFAS
Suunto
Women's Core Three-Ring Steel Buckle Nylon Watch Band
Nylon fabric with steel buckle hardware
Azo dyes in nylon fabric
Nylon watch bands are typically dyed with synthetic colorants. If azo dyes are used, they…
Bacterial or mold growth
Nylon fabric can retain moisture and sweat, creating an environment for bacterial growth…
Dye migration or color bleed
Lower-quality nylon bands may shed dye onto skin or clothing, particularly if wet or in…
Lower concern; nylon and steel lack typical PFAS triggers.
⚠Brand says nothing about PFAS
Suunto
Silicone Band - Sleek, Comfortable, Waterproof Design blue-black buckle / 22mm
silicone elastomer, stainless steel buckle
Bacterial/fungal growth in band texture
Silicone bands with embossed or textured surfaces can harbor sweat-borne bacteria if not…
Contact dermatitis from stainless steel buckle
Stainless steel can contain nickel; individuals with nickel sensitivity may experience…
PFAS
Suunto does not disclose whether waterproofing is achieved via silicone formulation alone…
Silicone band with no disclosed water-repellent finish or PFAS coating on record.
⚠Brand says nothing about PFAS
Suunto
Ambit 1 Smart Watch Band with Removal Tool
elastomer/silicone wristband
Skin irritation or allergic reaction from additives
Silicone may contain trace accelerators, colorants, or mold-release agents that rarely…
Heavy metals
Pigments in colored silicone bands may theoretically contain trace lead or cadmium, but…
Lower concern, but Suunto doesn't confirm PFAS status.
⚠Brand says nothing about PFAS
Suunto
7 Women's Nylon Watch Band with Steel Buckle
Nylon textile with steel buckle
Heavy metals
Nylon bands are typically solution-dyed or piece-dyed during manufacturing. While EU and…
Degradation of stitching and microfiber shedding
Over time, nylon threads can fray and shed microscopic fibers, especially if the band is…
Bacterial or mold growth from moisture retention
Nylon absorbs and retains moisture better than silicone, creating conditions for…
Lower concern; nylon band has minimal PFAS risk.
⚠Brand says nothing about PFAS
Suunto
Race 2 Watch
Stainless steel case, elastomer strap
Elastomer strap degradation and skin contact
Extended UV exposure and sweat may degrade the elastomer strap over years of use…
Nickel release from stainless steel (contact dermatitis risk)
Some individuals with nickel sensitivity may react to direct stainless steel contact…
Microplastics
All elastomer straps shed minute particles over extended wear, particularly where the…
No coating described, and no PFAS statement from the brand.
⚠Brand says nothing about PFAS
Suunto
Ambit3 Peak Watch
Stainless steel case, elastomer band
Elastomer band degradation and skin contact
Elastomer degrades over years of UV and sweat exposure; no specific allergen profile for…
Stainless steel nickel content
Stainless steel alloys contain nickel (typically 8-12% in 304 or 316 grade), which can…
Bacterial growth in sealed watch case
If the watch is not rinsed after sweaty or salt-water activity, bacteria and fungi can…
No coating described, and no PFAS statement from the brand.
⚠Brand says nothing about PFAS
Suunto
Silicone Band - Sleek, Comfortable, Waterproof Design green-silver buckle / 22mm
silicone elastomer with metal buckle
Metal buckle corrosion and plating degradation
The green-silver finish suggests a plated base metal (likely stainless steel or zinc…
Bacterial or fungal growth in band crevices
Silicone itself resists microbial colonization, but moisture and sweat trapped at the…
Microplastic shedding
Silicone bands are mechanically durable and do not typically fragment under normal wear.…
Silicone band material is not a material linked to PFAS, but waterproof treatment chemistry is not stated.
⚠Brand says nothing about PFAS
Suunto
Quest & M Series Rubber Strap
Rubber (elastomer)
Heavy metals
If the strap is colored (not natural tan/black), synthetic dyes may contain azo compounds…
Allergic contact dermatitis from accelerators or antioxidants
Rubber vulcanization additives (zinc diethyldithiocarbamate, thiuram disulfides) and…
Strap degradation and microparticle shedding
Rubber straps degrade under UV, ozone, and thermal stress, shedding microparticles. While…
Adhesive or glue off-gassing from attachment points
Straps are bonded to watch lugs with adhesive; composition is not disclosed by Suunto. If…
Rubber strap with no coating on record and no brand PFAS statement.
⚠Brand says nothing about PFAS
Suunto
Silicone Band
silicone elastomer
allergic contact dermatitis from polymer degradation
A small subset of users report skin irritation from prolonged silicone contact, though…
leaching of uncrosslinked oligomers
Low-molecular-weight silicone oligomers can migrate from poorly cured elastomers into…
Silicone band with no coating on record and no PFAS disclosure from Suunto.
⚠Brand says nothing about PFAS
Suunto
Silicone Band - Rugged, Waterproof, Flexible Design green / 20mm
Silicone elastomer
Bacterial or fungal growth on elastomer surface
Silicone is hygroscopic and can harbor microbes in skin folds and crevices if not dried…
Degradation from UV, ozone, or chlorine
Prolonged poolside storage or intense sun exposure can cause silicone to discolor…
No coating described, and no PFAS statement from the brand.
⚠Only vague "clean" claims
Suunto
5 Peak Active Band
Elastomer band
Azo dyes in elastomer coloring
Elastomer bands are typically dyed for color; low-tier suppliers may use restricted azo…
Dermatitis and skin irritation from band material or mineral buildup
Any wearable band can trap sweat, salt, and bacteria in prolonged contact; elastomer…
Formaldehyde / VOCs
Industrial elastomer production sometimes involves formaldehyde-based cross-linkers or…
Microplastic shedding during wear and washing
Elastomer bands can shed microscopic particles during friction (rolling band on skin…
No coating described, and no PFAS statement from the brand.
⚠Brand says nothing about PFAS
Suunto
Sleek Silicone Band with Brown-Black Buckle
silicone band, metal buckle
Nickel leaching (metal buckle)
If the buckle is nickel-plated or contains nickel alloy, skin contact with corroded or…
Azo dyes and colorant stability
The brown-black coloring is likely achieved through carbon black or organic dyes mixed…
Corrosion byproducts from buckle degradation
Buckle corrosion can release copper, zinc, or chromium salts onto skin. No field reports…
Lower concern. Silicone bands typically avoid PFAS, but verify buckle material.
⚠Brand says nothing about PFAS
Suunto
Women's Race2 Silicone Watch Strap
Silicone elastomer
Silicone oligomer or siloxane leaching
Uncrosslinked silicone oligomers can migrate from silicone elastomer into skin contact…
Bacterial growth or biofilm accumulation
Silicone surfaces can harbor bacteria if not rinsed regularly, though this is a hygiene…
Silicone strap has lower concern for PFAS based on material type.
⚠Brand says nothing about PFAS
Suunto
Silicone Band - Sleek, Comfortable, Waterproof Design orange-black buckle / 20mm
Silicone with buckle hardware
Buckle hardware corrosion and nickel leaching
If buckle is nickel-plated or low-grade stainless steel, prolonged sweat or saltwater…
Waterproofing additive toxicity (unspecified chemistry)
Suunto lists the band as waterproof but does not disclose whether waterproofing relies on…
Silicone band with no water-repellent coating or treatment disclosed.
⚠Brand says nothing about PFAS
Suunto and PFAS, common questions
- Does Suunto have PFAS?
- We graded 17 Suunto products, averaging Excellent (85/100). 17 grade Good or better. Grades are model-based estimates built from published materials, ingredients and disclosures, not lab tests.
- Is Suunto non-toxic?
- Suunto Smart Sensor is the highest-graded Suunto product we have scored, at 85/100. It depends on the product line rather than the brand, so check the grade of the exact item you are buying.
- Which Suunto products are lower concern for PFAS?
- The highest-graded Suunto products we have scored are Suunto Smart Sensor, Suunto Women's Core Smartwatch Band Loop, Suunto Silicone Breathable Band. That is our model-based estimate from materials and public disclosure, not a lab test.
Every grade uses the same public rubric. How grades work →