A dependable workhorse for zero-degree expeditions, this lofty North Face Summit Series® bag is insulated with water-repellent 800-fill ProDown and constructed with a wider, roomier cut and a center zip to make it easier to get in and out. Part of the Summit Series™ collection, the world's finest alpine equipment.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.
Responsible Down Standard
Certified to the Responsible Down Standard (RDS) by Control Union. The RDS ensures that our down does not come from animals that have been subject to any unnecessary harm, such as force-feeding or live-plucking, and helps track the down used in our products from farm to finished garment.
The fill power of goose down indicates two important features: the warmth-to-weight ratio and compressibility. Our products are insulated with exclusive, high-fill-power down ranging from 550 fill to 950 fill, representing the highest-quality down commercially available.