You need a watch that can keep up with your summer, from the office to the bar to the beach for a swim. These five waterproof watches are built to handle offshore nautical races and military special-ops raids – a little sand isn't going to stop them. "Just as you need different types of shoes for summer, you should have different types of watches," says Alpina president Ralph Simons. "A leather strap isn't as comfortable on a hot day."
Marvin Malton Bathyscaphe
The classic diver watch is a tool-based timepiece built to be durable. Marvin's Bathyscaphe has a mechanism to measure how long you've been underwater for any given depth and comes in three colors: yellow, green, or blue. "With a rubber strap, you can use this watch for diving," says Cécile Maye, Marvin's CEO, "and then switch to a fabric strap to wear in the city." [$1,680; marvinwatches.com]