Designed for those who treat life as the ultimate adventure, the Seiko Prospex line meets every challenge with technological excellence and style. Part of a rich legacy of innovation in high-intensity timekeeping, Prospex continues to celebrate a long history of sports watch excellence, leading the way with new advances, while recreating and reinterpreting landmark achievements. Expressing the beauty and mystery encountered by intrepid explorers of undersea caves, this extraordinary design, available exclusively as a U.S. Special Edition, features a textured light blue-gray dial evoking the changing tones of mineral and stone deposits on cave walls, as well as a uni-directional rotating elapsed timing bezel in a subtle two-tone to suggest the duality of light and dark within.