What are the advantages and disadvantages of the watch strap?

Metal strip steel sheet with steel belt, gold watch with gold belt, and some other materials, to be rigorous, no longer listed. Metal watchband is strong, life cycle is long, can wear a lifetime; It's not boring, it's not hot, it's kind of waterproof. I said that to some degree, which means strap to soak in the water without a loss, but the watch body except for specific diving watches, Rolex and could be as far as possible don't touch, don't touch the water to anger for maintenance of the necessary. Wear, metal belt is 凉, suitable for summer, winter start to play smart, it would be good. The length of the metal band is adjusted to the length of the pitch and some fine tuning, which is usually not very fit. Too tight, too loose to shake, not good. If you don't have the expertise and tools, it's hard to adjust the schedule. Although disclose basically screwdriver + percussion hammer can kill, but inexperienced easily broken, so let go of looking for a professional. The staff of the counter can certainly operate, but the training level is very different, I have also seen a lot of counter people to do not know the importance. If your body is changing in size, you'll need to pay more attention to it. By the way, you may be allergic to certain materials, such as the special 904 steel of Rolex... Remember to try. Repair and maintenance are nothing more than two points: one dirty, two injuries. There is no way to get the metal band dirty. There are too many parts and the cracks are too tight. Grab a wet paper towel and hold it down. But it's relatively easy to clean up, Rolex and some water meters tighten the crown and then wash it. It can withstand this kind of water pressure; The watch with no more than 150 meters of waterproof capability can be removed and washed separately, and then put on after drying (remember).