Much of the recent upswell of interest in this Aussie standard of foot warmers is owed to good marketing by major footwear labels, but at the heart of it, it's the fact that these boots are so durable, comfortable and natural that keeps people coming back for more, and recommending them to their friends and family.

So what exactly makes ugg boots so good? What are the scientific principles at work? At the heart of ugg boots are the durability and properties of sheepskin, and the comfort and warmth of wool. Together they fit your feet like a new skin, and keep you warm and comfortable like nothing else can.

Sheepskin as a foot protector is softer than cow-hide and other popular leathers. Its natural comfort and properties have seen it used medicinally. Research into support surfaces, materials that help prevent complications related to immobility such as bed-sores for people who are bed-ridden through illness, has shown that sheepskin can alleviate some of these problems when laid on top of patients' mattresses.

Sheepskin ugg boots also have natural thermostatic benefits. The lambswool sheepskin itself has thermal properties that keep you warm in winter, while the soft inner fleece also keeps feet perfectly warm in cold months, allows air circulation in warm months, preventing overheating, and making ugg boots perfect year-round attire for your feet.

In Australia, the world's largest producer of sheep after China, sheep shearers often make their own improvised footwear consisting of part of a cured sheepskin with the wool inside to use while working.

The quality of the skin used in various clothing items depends on several factors, mostly whether the pelt, which is the back of the hide, will be visible or not. Where the pelt is visible, better quality hide is used. Ugg boots, being high quality fashion items in addition to their practical value, are made from the highest quality sheepskin.

With natural properties that make it the perfect footwear item, ugg boots make the perfect comfort item for winter summer, the beach, and the home.