#1 WATER RESISTANCE
One of the most misunderstood features on a wristwatch.
“5 ATM”, “10 ATM”, “20 ATM” — it sounds like depth ratings, but it’s actually about pressure resistance, not how deep you can dive.
ATM stands for “atmospheres,” a unit of pressure.
Think of it like this: the deeper you go underwater, the more pressure pushes against your watch.
Here’s a simple breakdown:
5 ATM – Everyday use
Washing hands, rain, light splashes. Not meant for swimming.
10 ATM – Swim-ready
Safe for swimming, snorkeling, and pool use.
20 ATM – Adventure-ready
Built for serious water exposure, including diving conditions.
But here’s what most people don’t realize:
These ratings are tested in controlled lab conditions—not real-world movement.
In reality, things like:
- Moving your arm through water
- Diving in
- Hot showers
can create higher pressure than expected on a watch?
So what’s the takeaway?
Water resistance isn’t about how deep you go—it’s about how much pressure your watch can truly handle.
While many brands test only a small percentage of production, at Brillier we take a different approach.
Each watch is individually tested at our state-of-the-art horology facility in Mesa, Arizona, after meticulous hand assembly—using professional water resistance equipment calibrated up to 30 ATM.
Because true confidence isn’t printed on the dial…
it’s proven before it ever reaches your wrist.