This vest is fully loaded for running in cold weather. Zoned insulation holds warmth where you need it and stretchy fleece keeps you moving freely. water-resistant, glyde fabric Water-resistant Windproof Four-way stretch, breathable tech fleece fabric is DWR-treated to protect you from the elements PrimaLoft insulation is warm, even when wet 700-fill-power goose down provides lightweight warmth 100% of our down is certified to the Responsible Down Standard