UGG is a brand of footwear that originated in Australia. The company was founded in 1978 by a surfer named Brian Smith, who brought the boots to the United States in 1979. The boots were initially popular among surfers and later gained mainstream popularity in the 2000s.

UGG boots are made from sheepskin, and the brand has expanded to include other types of footwear, including slippers, sandals, and sneakers. The boots are known for their comfortable and cozy interior, which is lined with sheepskin and keeps the feet warm in cold weather.
The popularity of UGG boots has led to controversy, with some critics accusing the company of using sheepskin from animals that have been mistreated. UGG has responded by stating that they only source sheepskin from suppliers that meet their animal welfare standards and have implemented a program to ensure ethical sourcing.
In addition to footwear, UGG also produces clothing, accessories, and home goods. The brand has collaborated with a number of designers and celebrities, including Jimmy Choo and Tom Brady.
Overall, UGG remains a popular brand of footwear and has become a staple in many people’s wardrobes, especially during the colder months.