The new $255 Fossil Sport is one of the most comfortable smartwatches I've ever worn

At this point, I'm mostly used to smartwatches having one physical button, but the Fossil Sport has three.

The middle button does exactly what you'd expect: it pulls up the app drawer, and you can use it to browse through apps or scroll up and down on the screen.

The other two buttons are remappable, which means you set them up however you like in the watch's settings. I set my buttons up to be shortcuts: the top button is a flashlight, and the bottom button is a "Start workout" button, so I can quickly start a run without fiddling through the watch to much.

Over time, I noticed that the Fossil Sport tended to get a bit warm. Not warm in a concerning, my-watch-is-going-to-blow-up sort of way, but certainly in a noticeable way.

I don't think it's cause to be worried, and the warmth went away after a few minutes. But it was an unusual little tic.

Fossil didn't sacrifice any modern conveniences when building the watch, so you should find everything you're looking for: built-in GPS, a heart-rate sensor, NFC payments with Google Pay, the ability to pair Bluetooth headphones, and a microphone for talking to Google Assistant. Plus, it's swim-proof.

The Fossil Sport is among the first smartwatches to contain the new Snapdragon Wear 3100 chip from Qualcomm.

The new chip was intended to make a major difference in battery life, which has been one of the main issues holding smartwatches back. Fossil says the Sport watch should get 24 hours of battery life, plus an additional two days in battery saver mode, which is a feature of the new chip.

I found that estimate to be pretty accurate. The watch generally got about 24 hours of battery life, and another full day and a half or so in battery saver mode. The new mode is great — the watch will stay on and still be able to tell the time when it's in that mode — but it's worth noting that unlike battery saver mode on something like a smartphone, you can't remove it from that mode and use the watch normally.

Either way, it was nice to not have to charge my smartwatch quite as often as I usually do.

Google unveiled a new version of Wear OS earlier this fall, and while the changes aren't major, they definitely improve the experience.

If you've ever used a Wear OS watch before — which used to be called Android Wear until earlier this year — you're used to a few basic features: a round watch face; apps arranged in a rounded, scrollable list view; and the ability to swipe up and down to get where you need to go.

With the new OS, those things haven't changed, but Google did add a few nice features: a new and improved shortcuts menu when you swipe down on the watch face, better notifications that are easier to read, a new Google Assistant screen when you swipe toward the right (it's actually incredibly helpful), and a redesigned Google Fit app.

All of these changes mean the Fossil Sport feels modern, and it's easy to set up and use.

Well, Fossil does say the Sport watch is currently sold out, so you'll have to wait for a restock or check for resellers on third-party sites.

But when the watch is available, I'd consider it a worthy option for anyone looking for a fitness-focused smartwatch.

The Fossil Sport's design isn't my favorite, but it still looks nice on the wrist, and it's refreshingly lightweight. Fitness watches often tend to be too bulky or masculine, but Fossil's version is more versatile and more suitable for all-day wear.

Plus, the new Wear OS is a pleasure to use, and the battery life is certainly improved.

I think I'd still recommend Fitbit's Versa watch over the Fossil Sport — it's $50 cheaper and has better battery life — but the Fossil sport is an excellent runner-up.