Brooks-Range is no longer in business, and the Drift -10 has been discontinued. If you're looking for something new, check out the best cold weather down sleeping bags for 2020.
For truly cold nights in the mountains, turn to the Brooks-Range Drift -10 Sleeping Bag for a good night's sleep. Keeping your bag dry can mean life and death in the mountains, and with lofty 850+ DownTek hydrophobic down and a DWR treatment, this bag ensures you'll have nothing but dry, warm sleep. The halo collar, hood cloak, and baffled draft tube all combine to keep out any gusts of cold air and keep your body's own heat trapped inside where it belongs. The ergonomic footbox allows for a more natural sleep, while an internal storage pocket helps you keep essentials nearby.
Historic Range: $563.92-$799.97
The North Face Inferno -40F/-40C
$1,000 - $1,079
Western Mountaineering Puma GWS
$995 - $1,050
Western Mountaineering Bison GWS
Marmot Col MemBrain
$699 - $718
Valandré Bloody Mary