Garmin has refreshed its flagship outdoor-watch lineup. The Fenix 9 and Fenix 9 Pro, unveiled on August 25 and available since late August in 43, 47 and 51 millimeter sizes, are multisport GPS watches aimed at athletes and adventurers. Prices start at $999.99 for the Fenix 9 and $1,099.99 for the Fenix 9 Pro, with solar-charging models costing more.

The Fenix 9 delivers the base upgrades: an AMOLED display twice as bright as its predecessor's, a scratch-resistant sapphire lens, leakproof buttons and a 40-meter dive rating. Inside, Garmin says 50 percent more RAM feeds a new, more powerful map engine, making map panning up to 30 percent faster, and a new "perspective view" layers in more detail both close-up and far away. Storage doubles to 64 GB — enough for twice as many maps or up to 7,000 songs. Software additions include "Garmin Epic," which groups activities recorded over days, weeks or months into one shareable story; stamina zones and a stamina curve for better pacing; indoor rowing metrics; and expanded rucking features. Battery life reaches up to 29 days in smartwatch mode on the largest model.

The Fenix 9 Pro adds the headline hardware. It is the first Fenix with a titanium case, built with a nano-molding process that Garmin says fuses metal and plastic at the molecular level, keeping the watch thinner and lighter. Displays reach up to 3,000 nits, and the 51 mm Pro is the first Garmin watch with a 1.5-inch AMOLED — 15 percent more screen area without a bigger case. Solar-charging models run for up to 57 days in smartwatch mode. For the first time, satellite and LTE connectivity is available across every Pro size, enabling voice calls, texting and SOS via Garmin's 24/7 response center, LiveTrack notifications through Garmin Messenger and a new Garmin Locate feature — though it requires an active inReach plan, and coverage is not available in all regions. A new green-light mode on the integrated flashlight preserves night vision.

Reviews so far concentrate on navigation. TechRadar, which wore the watch on a 12-kilometer hike and a run, calls Garmin's maps "easily the best out of any smartwatch brand I've tested" and confirms they render 30 percent faster than the Fenix 8. The German site Golem titled its comprehensive test "Big upgrade — but by no means for everyone," a nod to the premium pricing and to the fact that the most impressive features are concentrated in the Pro models. Garmin has also announced it will bring several Fenix 9 software features to existing watches, but the full new mapping experience relies on the new hardware: the extra memory and storage, and on the Pro, the connectivity options.

For Fenix 8 owners, the decision comes down to whether the display, mapping and connectivity jump justifies the upgrade price. For everyone else, the Fenix 9 line resets the bar for premium outdoor sports watches — at a premium price.