Zumiez Inc. reported net sales for the four-week period ended Jan.31, 2015 increased 16.0 percent to $44.1 million, compared to $38.1 million for the four-week period ended Feb. 1, 2014. The company's comparable sales increased 12.3 percent for the four-week period ended January 31, 2015 compared to a comparable sales decrease of 7.6 percent for the four-week period ended Feb. 1, 2014.