Hunting in winter isn't exactly more comfortable than hunting in other seasons, but it sure gets warm when you slip into the Big Agnes Elk Park Sleeping Bag at night. Rated to 20 degrees Fahrenheit, the Elk Park feels right for most winter activities and, thanks to its Thermolite Extra synthetic insulation, it stays warm even if it gets wet. Big Agnes added a water resistant shell to help prevent it from getting wet, to help you get a sound sleep before tomorrow's big day. Inside, the Elk Park feels just as cozy as your bed at home, with a soft lining made of a cotton polyester blend. The Elk Park Bag's wide rectangular shape accommodates down jackets as well as twisting and turning. The full length dual zippers attach the Elk Park to other Elk Parks, and they allow easy in and out. Big Agnes' Free Range hood lets you move your head around even when the hood is snug, and there are draft tubes to keep cold air from seeping through the hood and zippers. Like most Big Agnes bags, the Elk Park features an integrated sleeve with stretchy side panels that fit most 25 inch sleeping pads.