Mizuno · Golf Balls & Equipment
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 exist.
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
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.
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.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
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 metals
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.
Source, FDA ↗Formaldehyde / VOCs
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.
Source, ATSDR ↗PFAS
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.
Source, ATSDR ↗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.
What we don’t know
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Mizuno has made none
Formulations change between production runs, so check the current label. How we grade.
More golf balls & equipment 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.