ISO 22810 vs MIL-STD-810H: what a watch claim tells you

What ISO 22810 actually covers

The International Organization for Standardization describes ISO 22810:2010 as a standard establishing requirements and test methods to verify the water resistance of watches, plus the marking a manufacturer is authorized to apply. Its public abstract describes the scope; it is not a product-specific test report. The ISO listing identifies the 2010 edition as published and current on the page consulted for this guide.

An ISO number should lead to more precise questions: which product is being described, what water-resistance marking does its maker provide, and what does the maker allow you to do while wearing it? Do not infer that every watch with water-resistance language has the same performance, or that a claim about a standard supplies a universal menu of safe activities. This guide relies on ISO's public abstract, not on the purchased text of the standard, and does not assert an exact test procedure.

What MIL-STD-810H is for

The U.S. Defense Logistics Agency's official MIL-STD-810 record calls it Environmental Engineering Considerations and Laboratory Tests. Its scope explains that it gives planning and engineering direction for environmental stresses during a product's service life. Crucially, the record says the document does not impose design or test specifications; it describes an environmental tailoring process that leads to tests suited to a system's requirements.

That is why an unqualified 'MIL-STD-810H tested' marketing line is incomplete. Ask which environmental factors were selected, whether testing was for the finished product and which party performed it. Different products can undergo different tailored tests. The label does not automatically mean the whole watch was tested against every possible condition, nor does it stand in for a watch-specific water-resistance rating. This is an interpretation of the Defense Logistics Agency's public scope statement, not a certification of any device.

Why the two labels cannot be substituted

ISO 22810 addresses water resistance of watches. MIL-STD-810H is a broader framework for considering and tailoring environmental tests of materiel. A product can discuss both, but citing one does not establish compliance with the other. Neither is a shortcut around checking the exact model's water rating and intended activities; a ruggedness statement cannot turn a general-purpose wearable into a dive computer.

A number followed by ATM is another distinct piece of information. Garmin's public water-rating definitions describe 10 ATM as resisting pressure equivalent to 100 meters, while listing swimming, snorkeling and high-speed water sports among suitable activities. Its separate 'Dive' category refers to testing to EN13319 for dive compliance and lists scuba diving. The pressure-equivalent number is not an instruction to take any 10 ATM watch on a 100-meter dive.

For a concrete example, Garmin's Fenix 7 Standard/Solar/Pro series manual lists a 10 ATM water rating and points readers to Garmin's rating definitions. That tells you something about that watch family, not about an unrelated wearable with a military-style claim. Even Garmin cautions that activity-generated pressure can cause water ingress despite being above a device's rated depth.

Questions to ask before getting in the water

Find the manufacturer's current instructions for your exact model, including any limits on water sports, controls, maintenance or damage. Check the activity you intend to do—pool swimming, open-water swimming, snorkeling and scuba are not interchangeable. If the maker does not expressly support your activity, do not derive permission from an ISO or MIL-STD label alone. For diving, use equipment and guidance intended for diving rather than relying on a general water-resistance marking.

A product description should say what was tested, by whom and for which activities. Vybe Health is pre-launch and this article makes no ISO 22810, MIL-STD-810H, ATM or diving claim for Vybe hardware. Treat any eventual product water guidance as model-specific documentation to check when available, not as a conclusion from this comparison.