A perfect layering piece for the weight sensitive athlete, the Men's Ultralight Down Shirt from Patagonia is built with superlight nylon fabric and high quality 800-fill down insulation. At less than 6 ounces this style will be surprisingly warm and there is a deep front zip for easy layering. The Men's Ultralight Down Shirt has a slim athletic cut so it will slide easily under other outerwear. For cool weather hikes or mid-layer use this style will provide a unique experience.