Don't choose between a warm or a lightweight sleeping bag when you can pack up the 27 Degree Down Rab Women's Neutrino 400 Sleeping Bag and get both in the same tapered design. Once you slip into this women-specific mummy bag and feel its hydrophobic 800-fill down capture your body's heat, you'll know that it's well worth its lightweight 31 ounces. Plus, since it features a weather-repelling Pertex Quantum fabric, water-repelling down, and a dry bag compression stuff sack, you can hike or climb knowing that your bag will be dry when you set up camp no matter what weather you encounter. Consider the trapezoidal baffles, anti-snag zipper tape, and neck baffle, collar, and drawcord hood your three-season bonus features.