Therm-a-Rest Women's Mira 15-Degree F Down Sleeping Bag Sleep Securely: SynergyLink Connectors bring your sleeping bag and mattress together for uninterrupted sleep Zoned Insulation puts fill where you need it most for lightweight warmth and ThermaCapture Technology amplifies warmth without added weight or bulk Move Freely: Our Efficient Comfort Fit gives you room to move without creating cold spots Carry Less: Ultralight, 750+ fill goose down offers compressible warmth