These are durable, all man made materials with good traction.  I got the gray color in size 6.5. They are almost true to size, maybe slightly long, but with socks they fit absolutely perfectly. These are really comfortable boots too.

The gray is a nice dark graphite shade and can be worn with anything you would wear black shoes with. The working buckles and the slouch detail make them adorable too. You can wear them with jeans, shorts, skirts and dresses, just about anything and they look awesome!  I am so happy with this purchase I want to get them in all the colors.