The Nato band
I've gotten a fair number of questions through the years about how to wear a Nato band. The pictures above illustrate how it should look when worn. The watch is a fairly typical Vostok Amphibia, the same watch seen below on a waterproof leather band (fully reviewed here), a good choice for a Nato as the stock Vostok bands and bracelets are not of the best quality.
The Nato style is a nice match for sport/military watches. It is adjustable for almost any size wrist and water can't harm it. It also has a unique look to say the least. It doesn't hurt that Nato bands are generally very affordable too. A good selection of reasonably priced models can be found here.
Incidentally, if you are curious about the origin of the Nato strap, see this thread on Watchuseek and this pdf file.