Garmin Forerunner® 255, GPS Running Smartwatch, Advanced Insights, Long-Lasting Battery, Slate Gray — Open-Box

Built with a slim design and an always-on, full-color display that’s light on the wrist and easy to read even in direct sunlight — with available sizes of 46 mm and 41 mm

Forerunner 255 provides up to 14 days of battery life in smartwatch mode and up to 30 hours in GPS mode for a full picture of your health — from sleep to training

Morning report summarizes your sleep, HRV status and daily workout suggestion in one place as soon as you wake up (This device is intended to give an estimate of your activity and metrics)

Get ready for your next race with training tips, personalized daily suggested workouts and completion time predictions based on course details, weather and performance

View your entire week of daily suggested workouts, which adapt after every run to match your performance and recovery

HRV status tracks your heart rate variability while you sleep, giving you greater insight into your overall wellness, recovery and training performance (This device is intended to give an estimate of your activity and metrics)

Get free adaptive training plans from Garmin Coach for a 5K, 10K and half-marathon, or create your own custom workouts in the Garmin Connect smartphone app

Evaluates your current training status to indicate if you’re undertraining or overdoing it; offers additional performance monitoring features, including recovery time after your workouts

When using a Running Dynamics Pod or HRM-Pro monitor (sold separately), get a continuous measurement on your wrist of how much power you’re applying to the road as you run, so you can manage your effort

When using a Running Dynamics Pod or HRM-Pro monitor (sold separately), get advanced running dynamics, including ground contact time balance, stride length, vertical ratio and more