This bag is hotter than ever. Seriously. The Cosmic down 20Â°F sleeping bag has been restyled for 2016 and now features the exceptional warmth of 600-fill hydrophobic DriDown for higher performance. That means more moisture defense and quicker drying in the cold and wet. Versatile enough to use in 3 seasons, with great features like a thermal comfort hood and top draft collar, it's a no-brainer for backpackers who love to be outside in rain, snow or shine.