The Western Mountaineering Antelope MF Sleeping Bag is a 3-season sleeping bag for hiking into the mountains. Rated down to 5°F, the bag is sewn with a weather resistant shell called MicroLite XP™. It's all about warmth and protection from the elements, since you never know what kind of weather you'll meet in the outdoors. A down filled collar and draft tube help prevent any leakage or drafts and at 2lbs, 7oz, it's still fairly light for the temperature rating. It's not about to protect you from bears, but it will certainly protect against the cold and resist weather and tent condensation.