Fjord Nansen Svalbard 450 Goose MID Sleeping Bag 765 g - left

Ultralight mummy-style sleeping bag engineered to support a natural sleep posture and allow for maximum freedom of movement. Constructed from premium nylon, the bag offers a robust outer layer and is insulated with goose down for optimal warmth.

The model offers a thermal insulation R-Value of 3.9, determined in accordance with the ASTM F3340-18 standard. This figure reflects the effectiveness of insulation from the ground—the higher the R-Value, the greater the prevention of heat loss.

R-Value classification as recognized in the outdoor equipment sector:

• 1.0-2.0 – optimal for summer conditions (night temperatures above approximately 10 deg. C)
• 2.1-3.5 – suitable for spring, summer, and autumn use (temperatures around 0–10 deg. C)
• 3.6-5.0 – appropriate for cold environments, near 0 deg. C, with protection in subzero conditions down to roughly -5/-10 deg. C
• 5.1-7.0 – designed for winter conditions with temperatures below 0 deg. C
• above 7.0 – intended for extreme winter scenarios with increased insulation demands

Actual thermal comfort is influenced by the sleeping system (bag, clothing), ground type, and the user’s individual cold tolerance.

Both interior and exterior surfaces feature lightweight 10D Rip-Stop nylon with a WR (Water Repellent) coating for enhanced moisture resistance. Specialized fabric impregnation helps minimize water absorption. The Rip-Stop weave ensures heightened protection from abrasion and prevents further tearing. A small pocket inside secures essential items, while integrated loops allow for easy attachment of a thermal liner.

Insulated with Polish goose down in a 93+/7 ratio, the sleeping bag delivers superior warmth and features an impressive 900 cuin fill power. Outstanding compressibility permits efficient packing. The H-shaped baffle construction maintains even distribution of down, preventing migration and cold spots. A shark fin-shaped footbox is ergonomically designed to mirror the natural positioning of the feet during sleep, optimizing warmth retention and alleviating pressure. The base of the bag is stitched at a 70-degree angle.

Featuring a two-way zipper on the left side, allowing access from either end. The fluorescent puller enables effortless operation in low-light conditions. Incorporates an Anti-Bite system to prevent the fabric from snagging in the zipper. An internal thermal baffle provides enhanced insulation along the lining. Compatible with another bag from the same line for pairing.

Featuring an integrated 3D hood, this design enhances thermal insulation, safeguards the head, and reduces heat escape. Its structure further deflects wind and repels moisture. The DUO drawcord merges elastic and webbing components—the elastic grants freedom of arm movement without requiring adjustment, while the back strap ensures quick loosening, making it particularly advantageous during nighttime use. Inside, a thermal collar—a down-insulated tube with a drawcord at shoulder level—effectively blocks cold air from penetrating, making it highly suited for low-temperature environments.

Easy to transport and store. Packed dimensions are just 36 x 19 cm, with a total weight of only 765 g, ensuring a lightweight and highly compact design.

Equipped with a practical stuff sack, the sleeping bag remains shielded from dirt and damage during transport.

The model offers a thermal insulation rating of R-Value 3.6, measured in accordance with the ASTM F3340-18 standard. This value indicates the insulation efficiency against ground chill—higher numbers signify greater prevention of heat loss.

Interpretation guidelines for R-Value ratings within the outdoor equipment sector:

• 1.0-2.0 – recommended for summer use, where night temperatures remain above approximately 10 deg. C.
• 2.1-3.5 – suitable for use during spring, summer, or autumn, under conditions ranging from about 0 deg. C to 10 deg. C.
• 3.6-5.0 – intended for colder environments, where temperatures are near 0 deg. C or negative, down to roughly -5 deg. C / -10 deg. C.
• 5.1-7.0 – designed for winter deployment, with temperatures dropping below 0 deg. C.
• above 7.0 – recommended for harsh winter environments requiring maximum insulation.

Thermal comfort ultimately depends on the sleeping kit (such as sleeping bag and apparel), surface type, and the user’s individual resistance to cold.

Freeze-drying involves a vacuum dehydration method conducted at extremely low temperatures (-50 deg. C). Utilizing advanced production techniques, freeze-dried meals retain their nutritional value and caloric content, offering a complete solution tailored to the rigorous requirements of demanding activities such as climbing, high-altitude trekking, sailing, as well as summer and winter adventure expeditions. Polar explorers, adventurers, and professional athletes on expeditions or at camps frequently rely on these meals.