What is the material of the watch strap?

Now, there are so many people wearing watches, not just because it makes people more stylish, but also a symbol of status. The watch strap is a general term for an effective part of the clock that keeps the watch fixed to the wrist. So, what are the wristwatch straps?
What are the wristwatch straps:
1
Precious metal watchband: expensive, exquisite workmanship, very luxurious. Suitable for high - level table and jewelry watches, etc., for special occasions.
2
Steel bracelet band: moderate price, high and low range of goods. Its advantage is durable, rough and bold, have athletic feeling. The main drawback is that some skin can cause allergy, the strap is not easy to clean, easy to hide dirt.
3
Genuine leather strap: there are quite a few types, and the price difference is very wide. There are crocodile skin, lizard skin, ostrich skin, cowhide, sheepskin, etc. Newer leather strap: devil skin, water snake skin. Elegant watch must match top leather strap, can show the temperament of whole elegance. Wearing comfort is an advantage. The main disadvantage is that it is easy to be affected by moisture, maintenance is difficult, not durable is its fatal injury.
4
Canvas or nylon strap: inexpensive, mainly used for military watches and sports watches. It will absorb water and smell easily.
5
Plastic band: the most inexpensive, mainly with electronic fashion popular watch. The design is diversified and colorful, but it has not yet grown up.
6
Silicon rubber band: gradually favored by watchmaker. It is mainly used in waterproof and water table, and it will be used more and more widely in the future. Silicone rubber has excellent physical properties: non-toxic, high and low temperature, acid and alkali resistant, elastic and easy to maintain.