The North Face introduces a 550-fill ProDown™ version of their two-person bag for couples seeking modern performance in an old-school format. The full-length zippers on each side can be unzipped to allow the bag to lay flat and be used as a large, insulated campground blanket.Read more
Goose Down Insulation
The North Face uses only the highest quality goose down in all of its products. Each lot of down is thoroughly tested at three stages of production for loftiness, moisture resistance and ability to regain loft after compression. The fill per of goose down is an indicator of two important fetters: the warmth-to -weight ratio and compressibility, both critical tot he user's warmth and comfort True fill power is measured by placing on ounce of down in a graduated cylinder and measuring the volume the down occupies ion cubic inches. The North Face products are insulated with exclusive, high-fill-power down ranging form 550 fill to 900 fill, which represents the highest quality down commercially available.