Timex · Waterproof Smartwatch Bands
Timex T77601 Expedition Leather and Canvas Watch Strap (18mm)
Lower concern. Leather and canvas unlikely to contain PFAS.
Timex makes no PFAS claims for this watch strap. Leather and canvas are inherently low-risk materials without known Teflon-family coating treatments. No public lab data available.
Shop Timex on Amazon →Material
leather and canvas
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
Category baseline
other is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
This is a replacement watch strap combining genuine leather and canvas (cotton weave), both natural materials with minimal chemical processing compared to synthetic polymers. Leather tanning and canvas finishing may involve chromium salts or formaldehyde-based resins, but these are fixed in the material and not typically mobile after cure. The 18mm size suggests it fits vintage or dress watches; the materials breathe against skin, reducing moisture trapping.
The brand's record and disclosure
Timex is a long-established US watchmaker with no public manufacturing transparency reports or third-party certifications for strap materials. The brand has not disclosed supplier standards or chemical restrictions for leather/canvas accessories. No recalls or hazard allegations linked to Timex straps are documented in public records. Timex does not market this product on material safety grounds.
How it compares in its category
Natural leather and canvas straps are among the lowest-chemical-load alternatives in the watch strap market compared to rubber or PVC options, which can off-gas plasticizers or volatiles. This Timex offering is a mid-range commodity product with no premium material claims (e.g., vegetable tanning or organic certification). Most replacement straps of this type carry similar undisclosed tanning and finishing chemistry.
If you buy it
Wash the strap with mild soap and dry thoroughly to prevent mold growth in seams or leather grain. Avoid prolonged wet contact or submersion, as leather will soften and canvas can mildew. Rotate between straps if worn daily to allow drying. Replace if leather cracks deeply, canvas frays extensively, or odor (indicating microbial growth) develops. Condition leather every 6-12 months with a neutral cream to maintain flexibility.
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.”
Chromium in leather tanning residues
Most leather uses chromium (III) salts in tanning; while fixed, some migration is theoretically possible with prolonged skin contact, though reported cases are rare for finished straps. Timex does not disclose tanning method.
Formaldehyde-based fabric finishes on canvas
Canvas may contain formaldehyde resins for stiffness or water resistance. Off-gassing risk is low in finished goods, but sensitivity to residual odor or dermal irritation is uncommon but possible with direct skin contact.
Mold and bacterial growth in seams
Leather and canvas absorb moisture and can harbor mold or bacteria if not dried thoroughly after sweating or washing. This is a maintenance issue, not inherent material toxicity, but poses skin irritation or odor risk.
Azo dyes in leather or canvas coloring
No recalls or reports of restricted azo dyes in this product. Timex does not specify dye chemistry, so presence cannot be ruled out, but regulated leather suppliers typically avoid banned azo substances.
Adhesive or glue at strap seams
Seams may use synthetic rubber or polyurethane adhesives that could off-gas or degrade with age and heat exposure. No specific data for this model; low concentration and indirect skin contact limit risk.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 72% 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.
More waterproof smartwatch bands 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.