At present, the best brand is ugg Australia, which is an American brand, and there is another brand called ugg, which is an Australian brand. Refer to the following paragraph and you will know.

UGG originally meant "snow boots". Its original meaning is: all wool round-headed boots. Therefore, the basic styles of UGG snow boots are similar. UGG snow boots originated from the Australian Air Force in the 1920s and were originally called ugly boots.

1994, an American company first registered UGG Australia trademark, and took "UGG" as the legal trademark of its company's snow boots. However, the original manufacturers of UGG in Australia did not register the UGG trademark, so they could not use UGG as a trademark overseas, but later UGG lost the case in Australia, so UGG can be registered and used by local manufacturers in Australia.