You read that right, Therm-a-Rest, the kings of the sleeping pad have just released a new line of sleeping bags and they are stout. From the 750+ fill goose down 0°F Altair (Read:Really Warm) to the 40°F Regulus Blanket they’ve got you covered…literally. The general premise behind the line seems to be warm, light and packable – directed at folks heading up the mountains and into the backcountry, whether it be on foot or on skis. Some interesting and innovative designs, especially the Navis 20-45°F hybrid bag featuring sewn-through construction in the upper half of the bag, which then layers easily over a lightweight parka or pullover. The 20-45 rating depends on the jacket that it is combined with. If you are heading out into the cold this winter and want to sleep as snug as a bug in a rug, check out the new line.