If you’re the sort who likes nothing better than eating up switchbacks, pounding out summits, making the backwoods your fitness playground, and generally pushing the limits for mind, body, and spirit, then the Polar Grit X is made to keep pace with you. Don’t let the trail-friendly 64 grams fool you — this watch packs an awful lot into its featherweight design.
The timepiece incorporates a built-in GPS, compass, and altimeter for tracking your location, finding your way, and keeping training and adventure-ready measurements, modules, and stats. Features include Training Load Pro, Recovery Pro, and Polar Flow for recording and tracking your workouts, plus Hill Splitter for monitoring your performance on uphill and downhill trails, and FuelWise for knowing exactly when to give yourself an energy boost. Whether you’re getting a steady feed of data on everything from your heart rate and calories burned to your swimming strokes, or you’re scheming out the perfect trail-running or mountain-biking route, this tough-as-nails watch — vetted via military-grade MIL-STD-810G testing — has got your back and then some.