Ugg boots

Ugg boots (sometimes called uggs) are unisex sheepskin boots, made of twin-faced sheepskin with fleece on the inside and with a tanned outer surface, often with a synthetic sole. Ugg boots were first developed in Australia although the exact date is uncertain.
There has been a dispute between manufacturers of ugg boots, as to whether "ugg" is a generic term and thus ineligible for trademark protection, especially in the region of origin. Deckers Outdoor Corporation holds the UGG trademark in more than 100 countries worldwide. Notable exceptions are Australia and New Zealand where the term is considered generic.