When the Sierras or the Rockies are your usual destinations and you need the maximum protection from your 3-season bag, leave nothing to chance with our Antelope. Its roomy 62? shoulder girth allows for comfort and the 7? loft from 26 ounces of high lofting down provides warmth to 5?. The security of this bag comes from a seal created by its 3-Dimensional down filled collar, robust draft tube, and well designed hood. Our Gore Windstopper 830 fabric is the lightest weight and most compressible of any other Windstopper fabric. It is the most water resistant of any laminated fabric designed specifically for sleeping bags. This bag has the collar and draft tube completely made with Gore Windstopper fabric to create an impenetrable seal. These Antelopes take over in early spring and last through late fall. At a total weight of 2 lbs. 13 oz., they are the most substantial 3-season bag available.