The Men's Arc'teryx Cerium Hoody is a down puffy for alpine ascents. When the cold settles in, this hoody is ready, because it's already stuffed into your pack, within the included stuff sack. This compressible companion is packed with 850 fill power down that provides the heat as you hike and explore the mountains. The recycled 15D Arato fabric shell has been treated with a durable water repellent finish for moisture resistance against light rain or snow, and both the shell and liner glide easily over and under layers. Adjust the hood for warmth, over a helmet or on its own, and push onward.