Levis (n.)youdaoicibaDictYouDict[Levis 词源字典]
1926, American English, originally Levi's, from Levi Strauss and Company, original manufacturer. Strauss' innovation was the copper rivets at strain points. A cowboy's accessory, adopted as a fashion c. 1940s.[Levis etymology, Levis origin, 英语词源]