Genuine Ugg sheepskin boots are usually fairly expensive. They're warm, light and comfortable to wear, making the high cost worth it for many buyers. Buying real Ugg boots can be difficult now that they're popular, though. The market is full of imitations that don't provide the same quality of construction, comfort and long life that the real thing offers. Fortunately, it's not difficult to tell whether a boot is authentic or a fake, as long as you...