Using only the highest quality Hungarian goose down in all of our 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 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.
900 Fill Down: Highest quality down commercially available. One ounce of this down expands to fill a volume of 900 cubic inches - the highest volume available. The lightest and most compressible down with the best warmth-to-weight ratio, 900 fill down is exclusive to The North Face.
800+ Fill Down: Outstanding warmth in a lightweight package with a high cluster-to-feather ratio. Increased loft than lesser fill downs, and added compressibility for superior warmth and performance.
700 Fill Down: Superior insulation in a lightweight design for bitterly cold excursions.
600 Fill Down: Strong warmth-to-weight ratio providing lightweight insulation across a range of temperatures.
550 Fill Down: Lightweight insulation with a high weight-to-warmth ratio.
