Garmin - fēnix® 5X Sapphire Smartwatch 51mm Fiber-Reinforced Polymer - Slate Gray with Black Band

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Take your exercise to the next level with this Fenix 5X watch. Preloaded maps make it simple to track cycling and exercise schedules, and easy Wi-Fi connectivity lets you rapidly transfer data. This Fenix 5X watch is water rated to 10 atm and is highly rugged, so you can take it virtually anywhere.

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What's Included

  • Charging/data cable
  • Garmin fēnix® 5X Sapphire Smartwatch 51mm Fiber-Reinforced Polymer
  • Owner's Manual

Ratings & Reviews

Overall Customer Rating:
94% of customers would recommend this product to a friend (301 out of 322)


Measures heart rate and calories burned

Preloaded activity profiles help you monitor multiple fitness exercises, such as running, cycling and swimming.

Backlit digital display

Easy viewing in low-light conditions.

Connected features

Include smart notifications, automatic uploads to Garmin Connect™ and personalization through free watch faces and apps from Connect IQ™.

Built-in navigation sensors

Include 3-axis compass, gyroscope and barometric altimeter as well as GPS and GLONASS capability to track in more challenging environments than GPS alone.

Wi-Fi-enabled design

Provides automatic activity uploads directly to Garmin Connect™ when connected to wireless networks.

Water-rated to 10 ATM multisport GPS watch

Suitable for splashes, rain or snow, showering, swimming, diving into water, snorkeling, as well as ready for any outdoor or fitness challenge.

Syncs to select Apple and Android devices

Such as iPhone, iPad, iPod touch and cell phones and tablets with Android for simple wireless communication.

Garmin Connect Mobile app

Provides a complete picture of your activities. Review and share your goals even before you return to civilization.

Date/month format

Quickly tell the date thanks to the date/month display.

Alarm function

Wake up at the right time with the included alarm.

Built-in rechargeable lithium-ion battery

Offers up to 12 days in smartwatch mode (depending on settings), up to 20 hours in GPS mode, and up to 50 hours in UltraTrac™ battery saver mode.

Ruggedized for adventure

Fits for adventure with rugged design featuring stainless steel bezel, buttons, rear case and a scratch-resistant sapphire lens.

Preloaded maps

Include TOPO U.S. mapping, routable cycling maps and other outdoor navigation features.

Distance/speed/pace can only be shared on 3G or 4G devices.

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Customer rating

would recommend to a friend

Expert rating




  • I will return it, maybe when it goes on sale for 299 and they have fixed the HRM with firmware updates I would look at it again as a part time watch, but at full price it as too many issues for me to keep.HarryPottar
    See all reviews that mention price as a con
  • Rating: 5 out of 5 stars


    • Verified PurchaserVerified Purchase
    • My Best Buy® Elite MemberElite Member

    Bottom line up front: AWESOME. As background, I purchased the FENIX 5 Sapphire Edition with metal strap, though I returned it - didn't "love it", size wise or function wise (no Maps). This was subsequent to the Apple Watch Series 2 (Nike Edition), Nixon Mission (both returned), Garmin Vivofit 2, and even a very high end automatic time piece I had regularly worn and still own. Now, all I wear and use is the 5X. I then purchased the 5X on a work trip where a Best Buy I visited just happened to have one in stock and the 5X metal strap as an add-on accessory. I preferred the 5X size, GPS and maps, and wanted the metal strap and rubber strap options. I have small-to-average wrists and was reluctant that the 5X would look and feel far to large; I was wrong. Somehow, this 51mm piece wears and looks fantastic. I purchased the Garmin Fenix 5X metal strap as well, which makes this piece absolutely business appropriate. I wear it with a suit and then transition to pounding a tire with a sledgehammer in the gym: same watch - very versatile and very durable. PROs: GPS acquisition - fast. Battery Life - ridiculous. Apple engineers could benefit from time spent with Garmin R&D. Average battery life is at least 10 full days, using all features. That said, I am not the uber-runner who is constantly using GPS to track every single run. I'll do 2.5-3.1 miles on the treadmill, transition to strength/weights, and add in a day of crossfit per week. It is far for more capable of metrics measurement than even I realize or need. Case and metal strap: lightweight, handsome, and super durable. Zero scratches on crystal or case, despite some scary moments in which I expected some serious aesthetic damage. Treadmill - super accurate for me. I set the incline on a treadmill to 1.0, speed at 7.6 to 9.0, and it is always within .1 of what the treadmill is reading. TEXT/Phone call/News Alerts: I get them all, seamlessly as a notification on the main screen. Compass: Awesome. Step count: VERY accurate. My VivoFit 2 remains parked in my armoire. This 5X literally does it all. Final super PRO: how EASY and rapidly straps can be changed with a simple sliding button at the end of each strap - literally genius concept. I can switch from rubber to metal straps in 2 seconds, though I now use the metal strap almost exclusively, even for running. CONs: ....................I can't readily think of any. I would add that if you are looking for an entertainment watch and require constant FaceBook type interfacing, this is NOT for you. Proceed to the Apple display at Best Buy and don't look back. does takes a good week to figure out and become competent with button functionality and choreography. Once you get in the grove, it's then very easy to use. So, in closing, yes, it's quite expensive - especially with the metal strap and a protection plan; however, it is all that I have worn for two months straight and I absolutely recommend it over any other piece in this market. Very well done, Garmin.

    I would recommend this to a friend

  • Rating: 2 out of 5 stars

    I wanted to love this watch but sadly it is back i

    • My Best Buy® Elite MemberElite Member

    I’m in my mid 50’s and pretty active, I workout 6 days a week, mixing P90x and Insanity, plus I walk 7 days a week. Normally after a very early morning workout, I walk on a treadmill at 10 degrees incline for 30 minutes at 3.8 mph. I then walk outside at night for at least another 4 miles sometimes 6. I have bicycle which I don’t ride as much as I should. I have a Fitbit charge HR since 2014 and recently upgraded to the charge hr 2, the only time this is not on my wrist is when I’m in the shower or it’s charging. The miles are off on the Fitbit, using map my walk or map my ride, the fitbit states 3.2 miles when I have done 4 miles. But its small and easy forgotten on the wrist. The HRM is off slightly, compared to my chest strap set up, when that read 176, my Fitbit reads 169, at 156 my Fitbit reads 148. If off constantly but it’s a good relative reading for intensity. I’m looking for close repeatability, if I’m at 144 then I know I need to push myself, if i’m around 165+ I know I’m good. The Fenix 5x, the HRM is off, really off, today was the final straw, I used the strength and treadmill app, only during my warm up did my heart rate climb to 156, after that it never ever went above 100, I wore my fit bit and chest strap to compare. At odd times checking my chest would read 156, my Fitbit 148 the Fenix 5x 84. It was really off, really off. On the watch face, just sitting here, it's reading 141 at the moment and my Fitbit is 85. It was great for outdoor walking yesterday, it got my miles down perfectly in tune with my my walk. However I got this for the fitness data and if it off by so much then the data is worthless. After an hour of strength training where part from the warm up it did not go about 100 bpm, the watch ted me I needed to rest 4 days?. Wow it’s going to freak it it stayed with me for the entire week. This is nice looking watch, at full MRSP it needs to be perfect, the screen is not very bright, very washed out and looks 8bit, it’s too large to wear 24/7 and the HRM is a deal breaker for me. I will return it, maybe when it goes on sale for 299 and they have fixed the HRM with firmware updates I would look at it again as a part time watch, but at full price it as too many issues for me to keep.

    No, I would not recommend this to a friend

    • Brand response



      Thank you for your review and sorry to hear about your issue with heart rate not displaying correctly. We do have some steps to improve the accuracy of the optical heart rate sensor. Below is the steps on how to improve that.

      Chris Garmin

  • Rating: 5 out of 5 stars

    Amazing and rugged!

    • Verified PurchaserVerified Purchase
    • My Best Buy® MemberMember

    This watch is the creme de la creme of the Garmin watches. I have worn it swimming, hiking, camping, trail running, weight lifting, kettlebells, golfing etc etc. I haven't done a Spartan race with it although that's coming! The GPS is great and the watch is very easy to learn and use. I love being able to customize the different watch faces to show a lot of the parameters I like to check while out exercising. I upgraded from a Fitbit Surge and the two are night and day even though there's a lot of the same features. The Garmin is way more sophisticated looking and rugged that other competitors that I decided to take the plunge on it. The hiking and walking activity monitors are amazing! I am able to track myself on the map on the watch. I thought it would be cr@p and too small but it is surprisingly detailed and even a lot of the trails I use have been on there. It got me out of a jam when I went down the wrong trail and I was able to figure it out after only 50 ft of being off track. It is definitely made for the outdoors persons. Might be a little bulky for females and smaller framed guys (the Fenix 5S is geared towards smaller wrists). I used it once golfing and downloaded the course info to see how that works. It's pretty crude since it's not their golfing watch but it was within 10 ft of accuracy with a laser range finder my buddy was using. It shows you distance to various spots on the green and will even keep track of your strokes. There's just so much it does and does well that I can't say it all here. Watch YouTube and check Google for a lot more info to help you decide. The battery lasts pretty long for everything I do and charging is very fast so you don't have to be away from it for very long. Not so good: - The onboard temperature sensor reads high due to the radiant heat from your wrist so that is a ding although there's not much they can do to fix that and keep that looking as good as it does. - Garmin is known for not being too easy to use with other branded stuff so make sure your apps and monitors are compatible or you'll need to get stuff that works with the watch or new apps that your friends aren't using. I got the HRM Run heart rate strap and it works flawlessly and so much better than my old BTLE one that I don't mind that. I miss my Fitbit friends so it would be cool if there was cross compatibility there. - The Garmin Connect app could use some upgrading as there's some content there that isn't intuitive to use and it takes some time to figure out where all the different places are to view or change settings. It's very data rich but just going through the menu structures could be a little overwhelming at first. Once you figure it out, you're good though.

    I would recommend this to a friend

  • Rating: 4 out of 5 stars

    Unstoppable GPS watch

    • Verified PurchaserVerified Purchase
    • My Best Buy® Elite MemberElite Member

    Watch looks great for every day use and the battery lasts forever compared to similarly featured watches (I'm using the NoFrills watchface). The battery is amazing and I've has no issues close to perfectly tracking my movement in the city with the watch on GPS ONLY on 1s tracking with Lock on Roads turned off. Was worried the watch would look huge on my wrist but it looks much better than I had anticipated on my small wrists. I had to buy a new band due to the buckle digging into my wrist. I went with the black heavy nylon 2 piece from Nato Strap Co (screws are size T5). The optical HR has its issues being on such a large watch and the standard bands aren't comfortable enough to wear as snug as you'll need for the wrist HR to work during training or ops. It works about as great as any other wrist sensor though. The watch is probably the best thing since sliced bread for training or doing ops places where you don't have any cell service. You can load OSM topo maps (or your own but after some testing I would avoid the ones Garmin sells due to it missing a lot of trails that are on OSM at least for my area) onto this watch and create an activity that will do Automobile navigation with multiple features like hazard/toll/highway avoidance and full turn by turn navigation. To do this I basically copied the standard Navigation activity then changed the Routing to automobile and tweaked some other settings. You will also need to load routable maps via Basecamp before you will see the Automobile option in routing. I use the OSM topo routable files from GMapTool. You can also track your HR, movement, and pace with your GPS readings over long periods of time and then play the track back like a video next to graphs with overlays of the tracked data for easy after actions or instruction on operations. Watch loses a star based on lack of decent sleep tracking compared to Fitbit, issues with the app (the backend was just down for an entire day and everyone who uses Garmin Connect was locked out of their information), and delayed canned responses from Garmin (except when they need you to do free quality control tests or troubleshooting for them). Sorry for rambling. Hope this review is helpful for someone looking to buy this tracker.

    I would recommend this to a friend

  • Rating: 5 out of 5 stars

    Nice Fitness Tracker with a Classic Durable Look

    • Verified PurchaserVerified Purchase
    • My Best Buy® MemberMember

    I've owned about a half a dozen fitness trackers, my last one being the Garmin Fenix 3. The Fenix 5X is loaded with more sensors and capabilities than I would ever use, but they're nice to have just in case; I like options. Heart rate sensor is probably the best I've used, GPS tracking is about average, but what puts this device over the top are the TOPO maps built into the watch, it's awesome. Fortunately for me my F3 came with a titanium band that actually fits the F5X, it's easier to take off and on and change wrist if needed, plus it's very light. The watchface options are a little thin right now, but that will change with time, since the F5X has just been released. I've been looking for the perfect smart/fitness tracker watch to replace my 30 year old Jules Jergenson (gold) everyday watch and I think I found it. Of course with technology advancing as fast as it is, the F5X might be obsolete in just a few years and probably won't last as long as my JJ watch, lol. Garmin has finally released a nice fitness watch that actually is worth the investment and it looks like it will be durable and flexible enough to last several years and still be useful. If you can swing the price, I'd go for it.

    I would recommend this to a friend

  • Rating: 3 out of 5 stars

    Nice but don't rush to upgrade

    • Verified PurchaserVerified Purchase
    • My Best Buy® MemberMember

    I stalked Best Buy web site for days waiting for this to be in stock. I have the Fenix 3 without HR now and was excited to get this. After a few days with it I think I'm going to return it. It's heavier than my 3, the screen seems darker in daylight and to me it's hard to read when looking straight at it esp with sunglasses (non-polarized). Not sure if it's the glossy sapphire glass or what is different but it's def noticable. I have to angle it away to actually see it many times. The wrist band feels thinner and less durable as well. The newer menus are nice, it's very responsive and moves quickly between tasks. I think I'm spoiled by using a HR strap so after so long with one the built in HR seems sluggish during some activities. The HR sensor makes the watch sit up higher on wrist and feel bulkier than my 3. It's a super nice very capable fitness watch and if you really need the mapping and other advanced stuff is a great choice but I find myself mainly just tracking runs, hikes, workouts etc. and I'm not finding enough that's better to justify the very very high price. It's nice having a constant HR reading though. I keep missing the 3 while I have this one on and for this price I should feel the opposite. I'll wear it a few more days and see, so far I'm really on the fence.

    I would recommend this to a friend

    • Brand response



      Thanks you for your review and sorry to hear about your issue with the fenix 5x. With the backlight settings you can change those settings to make sure you can read the screen.

      Chris Garmin

  • Rating: 5 out of 5 stars

    Top of the Line

    • My Best Buy® Elite Plus MemberElite Plus Member

    I am a big watch person. I liked having an Apple watch, but it I hate a square watch and it felt limited in the tracking department as far as exercise. I liked lots of the different Android wear products, but being a loyal iPhone user they were limited on the features that could be used even when they made the app for the iPhone. I was not going to get a google email account just so I could get a handful of extra notifications. So, it was between this watch and the Misfit Vapor which is not going to be released until this summer 2017 now. I went and looked at the other Misfit watch that currently is on the market, and they don't even sell it at Best Buy or any other retailors. You can get it online or at Kohls. That was a huge red flag for me, so I decided on the Garmin after checking out the Fenix 3 HR at Best Buy. Seeing the additional features that were being added to the 5X, it was a no brainer. For a digital watch, it is not very dressy and I am a suit and tie guy by day. I am looking forward to getting a leather band for it for just that reason, but in the meantime it is very comfortable and it tracks everything you need very accurately. I wore a Misfit Ray (great fitness tracker for the money and quality) for a few days with the watch and they were within a 100 steps of each other. I am still experimenting with the maps on this thing, but wow is it amazing! No wonder these things are so hard to find right now. It is clear why this is the best fitness watch on the market right now.

    I would recommend this to a friend

  • Rating: 4 out of 5 stars

    Cool Watch, Lots of info


    I am a triathlete as well as a U.S. Army Soldier. I have been using GPS watches to track my training as well as hikes and minor navigation assistance for a long time. I upgraded from the Garmin Vivoactive to the Fenix 5X Saphire about 4 and a half months ago. The features are very cool. My battery lasts upwards of a week while monitoring 4 runs, 3 bike rides, 3 swims, and 5 strength training sessions per week. I use an external heart rate monitor some times, but not always. The running information it gives me is very nice. every year, I do a VO2 Max test with a sports medicine doctor and the Garmin Fenix 5X is within 1 of where my doctor puts me. It takes about a month of running often to get an accurate reading on the VO2 Max. The training status is very helpful. It keeps me on track with how productive my training is and when I need a recovery week. The wrist based heart-rate is great for monitoring resting heart rates, but for exercise heart rates, it's not accurate. this is the reason I didn't give the watch 5 stars. a $700 watch should have an accurate wrist-based heartrate while training. It's incredibly durable. I use my watch in the field and it goes through heck and back with me twice a month. After I get back, I rinse off the watch and it looks good as new. The BRICK/Multi-Sport feature is the first app I've ever seen on a sports watch that feeds back information for a race or a BRICK both separately, and as one event. All in all, I have the coolest watch around. I have had a couple of friends who bought the watch after seeing how I use it and how useful it is.

    I would recommend this to a friend

What experts are saying

Rating: 4.5 out of 5 stars with 3 reviews

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Using an algorithm based on product age, reviewers ratings history, popularity, product category expertise and other factors, this product gets an alaTest Expert Rating of 91/100 = Excellent quality.
  • TechRadar (UK)Rating, 4.5 out of 5Luke Edwards on July 9, 2018
    Garmin Fenix 5X review
    A beast of an outdoor activity trackerFull Review
  • WIREDRating, 4 out of 5Brent Rose on September 7, 2017
    Review: Garmin Fenix 5X
    It tracks over a dozen sports, and the on-wrist maps are excellent.Full Review
  • Digital TrendsRating, 5 out of 5Lee Crane on August 25, 2017
    Garmin Fenix 5X review
    For athletes who track their pursuits in excruciating detail, there is no better watch than the Garmin Fenix 5X at any price.Full Review

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