Timex Expedition...inexpensive, waterproof and durable. I have, however, had some problems with the light and/or alarm going on these after a few years but this is not a huge issue. It isn't the best for dress, but for everyday is OK (I have the Expedition women's field watch for when I need a nicer looking watch, but the set knob tends to get caught on things and I have had one break as a result...not impressed with the durability of this one). You men seem to have a lot more to pick from as far as watches that are both practical and look nice...I know there's nothing stopping us women from just buying a "men's" watch, but I am not someone who could carry this off without it looking ridiculously big. So, I wear the practical-but-not-that-attractive sporty watch.
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The rhythm is gonna get you...and if it's v-tach or v-fib, the results will be shocking!