So light, and oh-so warm! Made for cold days on the piste. The ATMOSPHERE is the lightest down jacket in our collection and has an RDS certified duck down fill that will keep you warm in cold temperatures. The STORMLOCK shell provides double protection: it shuts out the wind and shrugs off light showers. The ATMOSPHERE is also extremely breathable, so it's ideal for all kinds of winter sports, from X/C and downhill skiing to snowshoeing. If you get too warm, simply stash the jacket in its stuff sack and drop it in your pack.