The Polar Grit X2 Pro is rugged but expensive

Polar’s latest fitness watch, as the name alludes to, is a rugged, adventure-focused device. This second interaction is 15% larger than the first Grit X Pro and sees quite a few improvements related to performance and durability. That includes Polar’s first-ever MIL-STD-810H certification, a faster processor, updated dual-frequency GNSS/GPS with redesigned antenna, and Strava Route syncing. There are also some sensor upgrades, such as a boost to Polar’s 4th-gen optical heart rate sensor, added nightly skin temperature readings, and a heart rate error correction feature.