Sportswear manufacturer Kellwood Co on Thursday revealed a sharp rise in its fourth quarter net loss as sales fell around 13 per cent and added it was reviewing its sourcing and distribution infrastructure. The firm, which produces the Kathie Lee collection for Wal-Mart, said its net loss reached $3.1 million, or 14 cents per share, compared with to a loss of $1.6m, or seven cents a share, in the year-ago period.