The most advanced of outdoor gadgetry tested in some of the world's most inhospitable of places (think Everest and the South Pole), Werdelin Dive & Ski Instruments is the gear of choice for those who live life, quite literally, on the edge. Whether skiing, mountain climbing or trekking to the extremes, The Rock will log both the environment and your performance using aerospace algorithms and for those who get their thrills beneath the ocean waves, The Reef has got you covered. It's the ultimate in precision instruments. The Rock, our second generation Ski Instrument, is an essential tool for protection, -