Durability, Comfort, and Dial-In Fit
Built with durability, comfort, and superior protection in mind, the Rocky Grindstone XTR is go-to footwear for demanding environments, keeping you safe and comfortable from dawn till dusk. Premium waterproof full-grain leather and Rocky's Guaranteed Recycled Waterproof Construction keep feet dry in wet, muddy conditions, while flex welt construction ensures long-lasting performance.
An oil, slip, barnyard acid, and chemical-resisting PU outsole provides traction you can trust on slick floors or uneven ground. Inside, the Air-Port Lite® Sponge PU footbed with memory foam delivers superior cushioning, and the micro-adjustable BOA® Fit System dials in a custom, consistent fit all day long.
Key Features of the Rocky Grindstone XTR 6" BOA® (RKK0521)
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ASTM F2413 Composite Safety Toe: Certified protective toe classification and electrical hazard rating.
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Waterproof Full-Grain Leather: Premium leather built for demanding job-site conditions.
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Guaranteed Rocky® Recycled Waterproof Construction: Keeps feet dry in wet and muddy environments.
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Flex Welt Construction: Long-lasting performance built to hold up over time.
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Oil, Slip, Barnyard Acid & Chemical-Resisting PU Outsole: Trustworthy traction on slick floors or uneven ground.
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Air-Port Lite® Sponge PU Footbed with Memory Foam: Superior cushioning that reduces foot fatigue.
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Micro-Adjustable BOA® Fit System: Fast, easy, and precise dial-in fit that performs all day.
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6 Inches in Height: Brown colorway.
Dial In Your Perfect Fit
The micro-adjustable BOA® Fit System replaces traditional laces with a quick-turn dial, letting you fine-tune fit in seconds and keep it consistent through a full workday.
Protection for Demanding Environments
Beyond composite safety-toe certification, the Grindstone XTR's PU outsole resists oil, slip, barnyard acid, and other chemicals — built for job sites where standard rubber outsoles fall short.
Why Choose the Rocky Grindstone XTR?
For anyone who wants certified composite safety-toe protection with a fast, dial-in fit and waterproof comfort that lasts all day, the Grindstone XTR is built to keep you safe and comfortable from dawn till dusk.
Similar Styles to Consider
Prefer traditional lacing with a wedge outsole? See the Rebound Wedge 6″ Composite Toe Work Boot (Tobacco).
Frequently Asked Questions
How does the BOA® Fit System work?
Instead of traditional laces, a micro-adjustable dial lets you tighten or loosen the fit in seconds, giving you a consistent, custom fit throughout the workday.
What is this boot's toe and electrical hazard rating?
The Grindstone XTR meets ASTM F2413 protective toe classification with a composite safety toe, along with electrical hazard standards.
What kind of job-site conditions is the outsole built for?
The PU outsole resists oil, slip, barnyard acid, and other chemicals, making it well suited to demanding environments beyond a typical job site.
Will my feet stay dry in wet or muddy conditions?
Yes. The Guaranteed Rocky® Recycled Waterproof Construction is built to keep feet dry through wet and muddy work.
