The picture to the side illustrates the style when it is not wet. (It appears bushy and kinky).
When moistened this hair becomes more curly/wavy. You can use simply water or special wet and wavy sprays to get a more defined curl pattern.
Usually wet and wavy hair is made of Human Hair.
Examples is the Legacy Super French Weaving which is 100% remy hair.
Sometimes though this style can be made of synthetic hair.
An example is Futura Super French Weaving which is made of Futura heat resistant fiber. Futura hair can be curled or straightened, it can sustain up to 375 degrees Fahrenheit.
The advantages of this hair style are numerous. Click here to see a video of this gorgeous hair.