Girls’ Columbia Sportswear Interchange 3-in-1 Jacket, size Medium, in purple with black accents. This versatile cold-weather jacket features a two-piece design — an Omni-Heat insulated inner shell and a durable water-resistant outer shell that can be worn together for maximum warmth or separately for milder weather. Perfect for skiing, snow days, or everyday winter wear. 1. Shell only – for rain or wind. 2. Liner only – for light warmth. 3. Together – for full cold-weather protection.