Shock-resistant, water-resistant, and solar-powered, the G-Shock watch just might be the toughest and most high-tech timepiece on the market. Made by Casio, the Japanese electronics company known for its musical instruments and calculators, G-shock men’s and women’s wristwatches use cutting-edge Wave Ceptor technology to automatically correct the time, and come with protective cushioning to keep the inner mechanisms running smoothly. Styles like the Frogman, the G-Lide (perfect for extreme sports), and a recently released series inspired by military style have become favorites among some of the world’s best athletes and survivalists. If bling’s your thing, check out G-Shock’s gold python digital watch, whose calendar can keep you on schedule until the year 2100.