Altair HD 0deg Down Sleeping Bag

From an overnight snowshoe to a multi day ski tour, the Altair winter sleeping bag by Therm A Rest now features Nixwax Hydrophobic Down and a reflective ThermaCapture lining to reliably keep you warm in the coldest months of the year. And when the temps are this low, you'll really appreciate how the SynergyLink System keeps you and your mattress under the warmth of the bag to maintain the precious warmth you need to sleep well. It also provides you the freedom to move however you like throughout the night, allowing you to wake fresh for the day ahead.