❄️ Stay warm, stay wild — conquer the extremes with Fjellduken!
The Jerven Fjellduken Extreme Mountain Bivvy Bag is a military-grade, multi-functional thermal shelter featuring PrimaLoft insulation and a waterproof aluminium-coated outer layer. Measuring 204 x 220 cm when opened, it offers exceptional warmth and versatility for year-round mountain use. Proven to maintain a 29°C temperature difference in freezing tests, it’s trusted by the Norwegian Army and designed for professionals who demand reliable, compact, and adaptable outdoor protection.
| Color | Mountain |
| Brand | Jerven |
| Manufacturer | Jerven |
| Manufacturer reference | 1031 |
| ASIN | B071GQCRXR |
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