The Garmin Forerunner 955 is a multisport GPS smartwatch for athletes, featuring a 46.5 mm case made of fiber-reinforced polymer and a 33 mm (1.3 inches) transflective memory-in-pixel touchscreen display with a resolution of 260 x 260 pixels, which is easily readable even in sunlight. It is equipped with multiband GPS, GLONASS, and Galileo for precise location tracking, as well as a wrist-based heart rate monitor, a barometric altimeter, and a thermometer. The battery life lasts up to 15 days in smartwatch mode and up to 42 hours in pure GPS mode without music. Key health monitoring features include continuous heart rate measurement, respiratory rate, pulse oximetry for blood oxygen saturation, stress level monitoring, sleep analysis with an advanced sleep score, and Body Battery energy monitoring. Fitness features include daily workout suggestions, training status evaluation, VO2 max estimates for running and trail running, as well as real-time stamina metrics. It can store up to 2000 songs, offers Garmin Pay for contactless payments, and includes safety features like LiveTrack and incident detection during activities. With a silicone band and Corning Gorilla Glass DX lens, it is water-resistant up to 5 ATM and suitable for swimming. Weighing 52 grams, it also includes smart notifications, weather updates, and compatibility with Garmin Connect and Connect IQ for customizable apps and watch faces.