Zumiez Inc., announced that total net sales for the four-week period ended August 1, 2009 decreased 5.6% to $29.9 million, compared to $31.7 million for the four-week period ended August 2, 2008. The company's comparable store sales decreased 16.8% for the four-week period, versus a comparable store sales decrease of 1.4% in the year ago period.