Running Smartwatch with Advanced Health and Fitness Features Run smarter with the Garmin Forerunner 255S GPS Smartwatch! The Forerunner 255S is the smaller of the two size options in the Forerunner series and measures 1.6 x 1.6 and has a 41mm display. The Forerunner 255S series operates on multi-band GPS so you ll receive accurate position throughout your runs. The always-on, color display is east to read even in the harshest sunlight. Fitness, health and wellness features make the Forerunner 255S a top running GPS smartwatch. Running features include personalized training tips, suggested workouts and completion time predictions based on course details, weather and performance. View an entire week of daily suggested workouts- which change based on your performance, health and wellness metrics. Free adaptive training plans from Garmin Coach are available with your Forerunner 255S purchase. These training plans include 5K, 10K and half-marathon and the option to create your own in the Garmin Connect app. Health and wellness features are at the forefront of the Forerunner 255S series. HRV to track your heart rate variability while you sleep, giving you greater insight into your overall wellness, recovery and performance. Garmin knows sleep is important, which is why the Forerunner 255S provides a morning report summarizing your sleep, recovery time and more. If you re looking for a running watch that will provide advanced health, wellness and training features- the Garmin Forerunner 255S is a top choice!