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The rugged Garmin Instinct 3 is on sale for Amazon Prime Day, happening now until Friday, June 26.

Deemed "Best Battery Life" by Men's Health gear editors, our hands-on testing revealed the indestructible outdoor watch can last an incredible 21 days on a single charge.

Shop it on sale now for 33% off, bringing the price down from $449.99 to an affordable $299.99.

WHEN IT COMES to fitness trackers, Garmin is hard to beat. There are plenty to choose from within the brand’s lineup , but we’re big fans of the Garmin Instinct 3 here at Men’s Health. It’s sturdy, has a great GPS system, and the battery life is more than impressive. It’s already one of the mid-priced Garmin options, usually retailing at about $449. But because it’s Amazon Prime Day , it’s looking more affordable. Down 33%, this editor-favorite is now at $300.…