Athletic footwear maker K-Swiss Inc on Tuesday revealed it more than doubled its second quarter profit from last year on the back of soaring sales and raised its earnings outlook for the fiscal year. The California-based firm reported net income for the 13 weeks ended June 30 of $12.6 million, or 67 cents per diluted share, compared with $6m, or 30 cents per diluted share, in the same period of 2002.