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A pair of ugg boots
Ugg boots (sometimes called uggs)[1] are a unisex style of sheepskin boots, made of twin-faced sheepskin with fleece on the inside and with a tanned outer surface, often with a synthetic sole.
Originating in Australia or New Zealand, where they became popular in the 1970s, ugg boots emerged as a fashion trend in the United States in the late 1990s and as a world-wide trend in the late 2000s.
There has been a dispute between some 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 theUGG trademark in 145 countries worldwide.[2] Notable exceptions are Australia and New Zealand where the term is considered generic.[3] More than 70 registered trade marks in Australia and New Zealand include the term UGG, in various logos and designs.[4]