Amazon’s summer Prime Day — which is now a four-day event rather than the usual two days — is well underway, and we’ve been working hard to surface the best deals for our readers. We’ve sorted through thousands of on-sale items to pinpoint truly excellent discounts on the things our experts have found are worth your time and money.

If you’re serious about tracking every step and heartbeat, the Forerunner 955 is your go-to. Its bright, always-on display makes checking stats easy – even under the blazing sun. With up to 15 days of battery life, plus detailed insights on your sleep, recovery, and training load, it helps you know when to push hard or take a breather.