International outdoor apparel and footwear firm, Columbia Sportswear Co, on Thursday posted a 79 per cent increase in fourth-quarter net income thanks to soaring sales of outerwear and cold weather footwear. The Oregon-based company said net earnings totalled $24.2 million, or 61 cents per share, compared with $13.5m, or 34 cents per share, in the fourth quarter of the previous year.