Casio Protrek Tough Solar PRG-550G-1 Mens WatchCasio Protrek Ana Digi Tough Solar PRG 550G 1 Watch The matte black sits well with the dark grey and white; it gives the watch a subtle look without making it stealth. The ana digi combo adds class to maturity and is a stark contrast to the cartoonish image that made most look down on such watches before. Its only competitor is the Casio G Shock series, but the Protrek packs a different oomph absent even in a G Shock. Exploration, sport or adventure,