One of our lightest alpine down vest: 90/10 white goose down and 800 fill power, together with its DWR (Durable Water Repellent) treated on outer fabric, it helps to stay dry and warm all the time. Weight below 250g and packs away into inner pocket, it makes it the perfect back up vest to have in your pack for summit breaks, sudden drops in temperature or chilly belays on the snow and ice