The Down Hugger 650 #3 is one of our most versatile sleeping bags. Designed for four season use, the sleeping bag has a comfort temperature rating of -1°C, but can go as low as -7°C if needed. This isn't just down to the deployment of premium 650-fill power down, there's a roster of innovative design features  which contribute. There’s many small, elastic gathered threads within the quilting and the seams which have been strategically oriented. These two features enable the sleeping bag to move naturally and draw insulation closer to your body as you change positions throughout the night, eliminating drafty spaces and retaining body heat. But that’s not all, our patented Super Spiral Stretch System reliably retains heat, the two way zip is insulated to shut out cold air, and has been reinforced with triangulated gussets for extra durability.