Snow boots, a type of shoe category, originated in Australia and were originally called Ugly boots. Australians wrapped two pieces of sheepskin into shoes to wear on their feet to keep warm. Later, they gradually became popular in Australia. This type of sheepskin boot became popular among shearers since 1910. The shearers took a small piece of sheepskin from the sheep's body, trimmed it, and used it to cover their feet. They called these shoes ugly boots. During World War II, Australian pilots wrapped two pieces of sheepskin into shoes to keep their feet warm, which gradually became popular in Australia. Back in the day, the Australian Air Force was the first to discover the wonderful function of Ugly Boots. They were made of wool inside and tanned incredibly soft sheepskin outside. They were designed to be round headed and round headed, never leaving their roots behind. People who have flown airplanes know (speaking in such a serious tone) that when pilots fly high into the air and remain motionless for a long time, they are most likely to feel cold. Therefore, it is widely recognized that Air Force boots need to have the most insulation effect. Therefore, snow boots were designated by the Australian Air Force to produce specialized military boots, which were once called FUGG, also known as Flying Ugly boots. The characteristics of natural leather are superior to other materials in that it is flexible, breathable, wear-resistant, folding resistant, and beautiful, making it an essential upper material for high-end leather shoes. Its characteristics are: 1. There are significant differences in the quality of natural leather parts. Due to the different functions of the skin on the animal body, its generation and development are also different. After making leather, the fiber structure and density of each part are different, and the tear resistance and tensile strength are also different. Especially in terms of visual and tactile extension, it has different resistance to bending and processing performance. 2. The fiber (silk pattern) structure in the area has directionality. The fiber orientation varies in different parts of each piece of leather. When leather is subjected to stretching, the elongation varies in different parts. Some have different force ratios, and their elongation also varies greatly. 3. It has breathability. This feature allows the wearer's sweat to flow out of the shoe cavity, making the wearer feel comfortable. 4. Good heat and cold resistance. 5. It has good wear resistance, stamping resistance, and easy processing performance. 6. Leather is soft, tough, and has elasticity and resistance to bending. Adapt to human physiological needs. 7. It is aesthetically pleasing and has the ability to be easily modified and shaped.