Mizuno · Golf Equipment & Balls
Mizuno RB Tour X Golf Balls
Golf balls unlikely to contain PFAS; no brand disclosure available.
Mizuno RB Tour X uses standard Surlyn cover and synthetic core materials not typically associated with PFAS. No public PFAS claims or testing data from brand or third parties.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Surlyn cover, synthetic rubber core
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
The Mizuno RB Tour X uses a Surlyn ionomer resin cover paired with a synthetic rubber core. Surlyn is a thermoplastic elastomer used in golf ball manufacturing for decades; it resists scuffing and water absorption, which means minimal degradation during normal play. The rubber core provides compression and spin characteristics. Neither material is known to leach harmful compounds under typical golf ball use (outdoor, room temperature, no heating or food contact).
The brand's record and disclosure
Mizuno has not publicly disclosed detailed chemical composition or independent safety certifications for this golf ball model. The brand has no recorded recalls or safety controversies specific to the RB Tour X. Mizuno's parent company (Japanese sports equipment manufacturer) operates under Japanese industrial standards but does not appear to market extensive third-party toxicology data for golf balls in particular.
How it compares in its category
Golf balls as a category carry minimal consumer safety concern compared to food-contact cookware, textiles worn against skin, or cosmetics. Surlyn covers are industry standard and have long safety history. Performance-tier balls like the RB Tour X are chemically comparable to competitors (Titleist Pro V1, TaylorMade TP5) with no meaningful safety differentiation in available literature.
If you buy it
Store golf balls at room temperature away from direct sunlight to avoid potential cover degradation over years of storage. Do not heat, microwave, or expose to solvents. Wash scuffed balls with mild soap and water; discard if the cover develops large cracks or separates from the core, though this takes extensive play. No special maintenance is required for routine use.
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.”
Cover material degradation and microparticle shedding
Prolonged UV exposure and repeated impact may cause Surlyn to crack or flake over years; shed particles are not ingested in normal play but could theoretically enter waterways if balls are lost in aquatic environments. No published data quantifies microplastic release from golf balls in field conditions.
Rubber core and synthetic material off-gassing
Synthetic rubber cores are not known to emit volatile organic compounds at outdoor temperatures. No respiratory or dermal sensitization hazard is documented for Surlyn or rubber in golf ball form under normal handling and play.
Heavy metal contamination in dyes or coatings
Golf ball covers and paints used by major manufacturers are not publicly documented to contain lead, cadmium, or other heavy metals. Mizuno has no known recalls for this hazard class. Paint contact during normal grip and play is minimal and non-ingestive.
Formaldehyde or flame retardant residues
Surlyn ionomer and synthetic rubber do not require formaldehyde resins or halogenated flame retardants in their formulation. No evidence suggests these additives are used in the RB Tour X.
PFAS in cover or core materials
Golf balls are unlikely candidates for intentional PFAS use; neither Surlyn nor rubber cores typically require water-repellent fluorochemicals at the manufacturing scale. No brand or independent testing has flagged PFAS in this product model.
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 golf equipment & balls 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.