The women's Cool-Lite Rush combines a light and weather-resistant nylon shell with a soft and warm merino mesh lining, making it the ultimate active layer for trail running, hiking, and other outdoor pursuits. Its nylon face fabric has a DWR finish that sheds wind and light rain. Icebreaker's 145gm Cool-Lite™ mesh lining combines breathable merino wool with natural Tencel® and strong nylon, for the ideal balance of moisture wicking and quick drying performance. Laser-cut holes along the back and through the underarms improve ventilation, and a reflective front zip improves low-light visibility. The entire Cool-Lite Rush Windbreaker packs into one of its zippered pockets.