Garmin makes some of the best fitness watches in the business, especially if you’re a runner or a triathlete. Several models are on sale for Prime Day, including the Forerunner 255 and 955. But you may want to act fast—Garmin deals often sell out quickly.

Garmin Vivoactive 5: was $299.99 now $249.99 at Amazon Garmin's dainty AMOLED Apple Watch rival gets a hefty $50 discount here – a very good deal. Keep track of heart rate, energy levels, pulse ox and loads more, with 20 different workout profiles, Spotify, Deezer and other music integrations, and up to 11 days of battery.

Garmin is dropping a major sale during Amazon's Prime Big Deal Days, with discounts as high as 44 percent off. But hurry, these deals will only be available for a few more hours. What makes Garmin's watches so great is the ability to deliver pinpoint accuracy inside a simple user interface.