There are 640 muscles in the human body and Rugged 30 is designed to fit, flex and wear like the 641st. Workout-ready with a digital stopwatch, timers and alarms, it's tough enough for ten more "reps" and the rest of your day. With a digital fashion chronograph display featuring large digits, this watch makes it easy to keep track of your times even in the middle of your run or workout. This is a excellent choice for athletes training who need to keep track of lap times. The black resin strap makes this watch stylish enough to wear out after your workout.