Forerunner 955

The new 955 comes in two styles, solar and non-solar. Both are 47mm.

The 955 has a 22mm band. 

Weight:53g

Water rating: 5ATM (waterproof and comes with a swim activity to measure laps and strokes)

Battery Life: Up to 15 day, up to 20 days with appropriate solar. 

Battery life (GPS only) up to 42 hours no-solar/ up to 49 hours with solar

Battery life Dual band + all systems, no Music: up to 20 hours/ up to 22 hours.

Battery life Dual band + Music: up to 8 hours.

Battery life Ultratrac: up to 80 hours no-solar/ 110 hours solar.