Prada has revived its Linea Rossa collection of sports clothing and footwear, first launched in 1997, putting its thin red line on more competitively priced and more contemporary garments with high-tech features for a younger clientele. Some of the items are meant for skiing and or snowboarding. The collection is being presented at special events in New York, Hong Kong, Shanghai and Tokyo between Sept. 8 and 14. It will become available later this month at all Prada stores, on its website and at selected department stores.