Sleeping inside a ring of fire is exciting, but kind of dangerous, so it's probably a better idea to zip yourself up in the Mountain Hardwear Bozeman Torch Zero Degree Synthetic Sleeping Bag instead. It won't have your adrenalin racing quite as much, but the polyester fabric and Thermal. Q synthetic insulation will keep you warm without setting you ablaze. Adrenaline's not so conducive to sleeping, anyway. Thermal. Q will stay warm even if it gets wet, something down won't do, and the Bozeman's snug mummy cut and comfort footbox are shaped to let you sleep comfortably without restricting movement or letting heat escape. The face gasket and hood and chest drawcords are easy to operate and stop heat from escaping, while the fleece lined stuff sack doubles as a soft pillow, which is a seriously sweet bonus.