When I first reviewed the Garmin Forerunner 255, I said it was a steal for runners who wanted dual-frequency GPS at a more palatable price. Well, thanks to Prime Day discounts, it’s even more palatable at $219.

The best fitness trackers can not only help you understand your exercise habits but give you real-time health data to help you hit all your workout goals — and there’s no better personal trainer to have by your side than the Garmin Forerunner 55.

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.