G Unit

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As a nerdy 1980s youth, I coveted Casio’s calculator watches. And as a 1990s teen, I thought the tank-tough Casio G-Shock was the shizzle. Now, in 2009, the CASIO G-SHOCK RISEMAN ($220, casio.com) is the watch to rock — it marries classic G-Shock indestructibility with climber-friendly functions: a barometer (with graphs that show atmospheric-pressure trends), altimeter (with markers and trend options to track ascent/ descent), and thermometer. Also bizzled is the Multi-Band 6 Atomic Timekeeping feature, which automatically radio-calibrates for accurate time. Best yet, the rechargeable batteries draw from a Tough Solar power system. Watch nerds, rejoice!

—Justin Roth