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A new dependable workhorse for zero-degree expeditions, this down bag is thirsty for cold-weather. Constructed with 850 fill goose down, this lofty down Summit Series® bag is designed with bomber, waterproof Pertex® Endurance™ shell to prevent you from getting, or staying, wet in critically cold conditions. Most down bags lose their warmth when wet – this bag eliminates that.
Using only the highest quality goose down in all of our products, The North Face® tests each lot of down at three stages of production for loftiness, moisture resistance and ability to regain loft after compression.
The fill power of goose down is an indicator of two important features: warmth-to-weight ratio and compressibility, both critical to retain warmth and furnish comfort. True fill power is measured by placing one ounce of goose down in a graduated cylinder and measuring the volume the down occupies in cubic inches. The North Face® products are insulated with exclusive, high-fill power goose down ranging from 550 to 900 fill, which represents the highest quality down commercially available.