Thermarest antares 15 degree down sleeping bag orange description updated for 2014 a three season sleeping bag should handle it all from late season snowstorms to early frosts the award winning antares down sleeping bag delivers that performance in an ultralight package without sacrificing the warmth and comfort you need for a great nights rest additional box baffling now holds more loft and eliminates drafts resulting in a new temperature rating of 15f 9c the change didnt ad