The Garmin Fenix 7 is one of our picks for the

you can buy — and for good reason. Not only is the battery life phenomenal, it comes with accurate GPS tracking, heart-rate monitoring, tones of multi-sports modes, in-depth running analytics, sleep score, morning report and more. And right now, in the Amazon Prime Day sale, you can save on just about every size model: from 30% off the standard 7 to 33% off the 7X Solar.

I wear the Garmin Fenix 7 Pro pretty much 24/7 and it's essentially what you get when you cross a high-spec training tool with a sleek smartwatch. It packs an impressive battery life of 22 days in smartwatch mode (or 73 hours with GPS), military-style multi-band GPS (designed to improve GPS accuracy), new training features and a much-more accurate heart rate monitor. It's one of the best Garmin watches you can buy — and one of the top Prime Day Garmin deals I've spotted so far.

But the Fenix 7 comes in various other iterations, with each model offering a different Amazon Prime Day discount: 7S is the smallest at 42mm; the 7 measures 47mm; and the 7X comes in at a hefty 51mm.

As well as size options, there is a choice of materials, meaning you can opt for a Standard, Solar, or Sapphire Solar model. And then there's the Fenix 7 Pro which offers more advanced features.

Garmin Fenix 7

Not fussed by solar charging? The Fenix 7 boasts all of the same tech as the Fenix 7 Solar (below) but without solar charging.

Garmin Fenix 7 Pro Solar

Featuring solar charging, 22-days battery life, advanced training features and a built-in flashlight, the Fenix 7 Pro Solar can handle pretty much anything you throw at it.

Garmin Fenix 7S Solar

The Fenix 7S Solar is the smallest fit, more suitable for those with smaller wrists, and boasts the biggest battery life. It has a colour touchscreen and colour TOPO maps, plus all the usual features like suggested workouts, training effects and load feedback, sleep tracking, phone-free music playback and more. The crème de la crème of GPS watches, currently boasting a not-to-be-sniffed-at 21% off.

Garmin Fenix 7X

If you're looking for a bigger watch, the Fenix 7X is the largest of the three sizes but comes with all the same features as the Fenix 7 Solar and 7S Solar. It also has the biggest, juiciest discount with 36% off at Amazon.