For Prime Day Amazon is offering a whopping 43% discount on the Forerunner 255, bringing its price down to just $199 from its regular price of $349. This is the company’s best-selling product, and it has a 4.7 out of 5 rating and it can be purchased as a limited time offer that does not require a Prime membership.

The summer is a fantastic time to get outside and be active, and if you're planning on getting serious about fitness this season, you might want to add a good fitness tracker to your repertoire to keep yourself in sync with your goals.

Amazon is hosting yet another Prime Day sale and, for the first time ever, it's running across four days, from Tuesday 8 July until midnight on Friday 11 July. Armed with a handful of price tracking tools and countless hours spent testing the best health,