Western Mountaineering provides a variety of desirable features in all their sleeping bags. Choose a mummy bag or a rectangular bag with storm flaps, draft tubes, full collars, and/or reverse differential cut hoods to keep you warm at the head end, along with extra room and abrasion resistant material in the foot boxes. Western Mountaineering divides their sleeping bags into 4 product lines. ExtremeLite bags are ultra light bags designed for when weight and compressibility are vital and are temperature rated in a range between 10 and 45 degrees F (Lite appears in the product name). Microfiber Series bags are still lightweight enough for most backpackers and are temperature rated from just above freezing to as low as -25 degrees F (MF appears in product name). When winds are high and temps are low, you may prefer a bag made with Western Mountaineering's proprietary Gore Windstopper 830 fabric for its weather resistance and breathability. Just look for bags with GWS in the name for the Gore Windstopper (-10 to 15 degrees F) or Gore Windstopper Expedition (-45 to -25 degrees F) product lines. Whether you're looking for a bag for mountaineering, backpacking, or for when temperatures dip below 0 Fahrenheit, Western Mountaineering has you covered. All these high quality sleeping bags are covered by their Limited Lifetime Warranty to repair or replace damage caused by manufacturer's defects. For help making an informed purchase, read what our customers are saying about all this gear in reviews from verified purchasers. Buy from Campsaver for great service and great gear at great prices. Plus free shipping on orders over $49.