With our canvas sleeping bag, you can enjoy cuddly warmth, even if the weather is frightfully cold. To ensure you’re warm down to -10°F, we’ve packed our bag with 6 lbs of Poly-Therm insulation. We use a tough cotton canvas shell, cotton flannel liner, double layer construction, and a heavy-duty #10 zipper to provide ultimate comfort and durability. Comes in a heavy-duty cotton canvas duffel carry bag. For a special touch, we’ve finished it off with offset stitched construction to prevent cold spots and insulation shift.