Stretchy enough to keep on while you hike, warm enough to lock in body heat and keep out in-between season chills, the Stretch Down Jacket is built for activity. It's stuffed with light and lofty 700-fill responsibly sourced down that squashes to virtually nothing for storage in your backpack. And so you don't need to layer up with a shell jacket at the first sign of a late spring snow flurry or light summer shower, the durable nylon-elastane face fabric has been finished with a water