Designed to military-level standards with scratch-resistant sapphire glass for ultimate durability, Polar Grit X Pro Sapphire is built to handle the most demanding situations with ultra-long battery life, unrivaled GPS accuracy and Polar Precision Prime™ wrist-based heart rate tracking. It equips you with all-new navigation tools, always-on outdoor features, plus Polar´s ultimate training solutions so you can go wherever your heart takes you.Rugged Durability:Scratch-resistant sapphire glass and premium FKM wristbands make this watch even stronger than its predecessor, and with MIL-STD-810G premium design and up to 100m water-resistance, it's built to handle any environment.Ultra-Long Battery Life:The ultra-long battery life will not let you down, giving you up to 40h battery life for training with full GPS and HR tracking (and even up to 100h with power save options). Up to 7 days in watch mode with 24/7 HR tracking.Always-On Outdoor Dashboards:All-new navigation dashboards include always-on altimeter, compass and location coordinates so you know exactly where you are and where you're heading. The new daylight dashboard gives you the sunrise, sunset and twilight times and weather reports- crucial for planning your hike.Track Back & Route and Elevation Profiles:Lose yourself in the thrill of adventure, never doubting that you will find your way back with the track back feature allowing you to navigate back to your starting point via the route you came. With route and elevation profiles you know your current position, how much you've ascended or descended, and how much you still have to go - so you can be prepared for whatever lies ahead.Route guidance and Turn-by-Turn Guidance powered by komootKomoot is the ultimate route planning and navigation app that allows you to easily create, discover and customize routes for all adventures. The route can be easily synced to your Grit X Pro Sapphire, providing you with real-time, turn-by-turn guidance to keep you on the right track.Unrivaled OHR Tracking and GPS Accuracy:Polar Precision Prime™ sensor fusion technology provides you with our world-renowned wrist-based heart rate monitoring, whilst the built-in GPS provides exact locations & assisted-GPS ensures fast fix times. Grit X Pro Sapphire supports GLONASS, Galileo and QZSS satellite systems.Automatic Overnight Recovery Measurement:Fully automatic and intelligent, Nightly Recharge™ and Sleep Plus Stages™ help you to track your sleep behavior and understand how well you have recovered from training and other factors during the night so that you can make the optimal choices for the day ahead.Training Load Pro:Training Load Pro™ helps you see how your training sessions strain the different parts of your body, clearly showing how much you've been training lately, so you can optimize your training.Hill SplitterTrack every ascent and descent with Hill Splitter™ - the automatic uphill and downhill detector that uses your speed, distance and altitude data to...