Monday February 22, 12:52 PM (EST) Levi Strauss to lay off 5,900 SAN FRANCISCO, Feb. 22 (UPI S) _ Levi Strauss has announced (Monday) that it will close 11 of its 22 North American manufacturing facilities this year and lay off 5,900 workers _ 30 percent of its workforce in the United States and Canada. The clothing manufacturer says it will shift ``a significant portion'' of manufacturing for the U.S. and Canadian markets to contractors throughout the world as part of an effort to improve its competitive position. _-