When you need the maximum protection from your 3 season bag, leave nothing to chance with the Western Mountaineering Antelope. Its roomy 62 inch shoulder girth allows for comfort and the 7 inch loft from 26 ounces of high lofting down provides warmth to 5 degrees. The security of this bag is sealed with a full 3 Dimensional down filled collar and a robust draft tube. While extremely weather resistant, the MicroLite XP shell retains maximum breathability and its down filled collar is sewn with MicroLite XP fabric. These Antelopes take over in early spring and last through late fall. At a total weight of 2 lb 7 oz, they are the most substantial 3 season bags available.