Made of Corning Gorilla 3 tempered glass with anti-fingerprint coating
Battery life:
12 days while having heart rate always on, sleep monitoring, 150 notifications with screen light-up, running or exercising with GPS on for 30 minutes 3 times a week, 5 minutes for other operations and lifting your wrist to see screen 30 times a day.
34 days while turning bluetooth and heart rate reader off and other features and lifting your wrist to see screen 100 times a day.