The Warmpeace Viking 300 is a down sleeping bag in a mummy cut with a 300 g duck down fill (600 cuin loft to the European standard, 90/10 down-to-feather ratio). A 6 °C comfort rating and 0 °C limit place it in the summer-to-three-season category — suited to trekking, cycling, and paddling trips in the warmer part of the season rather than cold autumn nights at higher elevations.
Horizontal H-baffle construction with a differential cut, where the outer shell runs larger than the inner lining to keep the down from compressing, is standard practice in a well-built bag; a two-way, full-length zipper on both sides also allows two bags to be zipped together into a double. In the version sized for users up to 180 cm tall, it weighs 720 g and packs to 3 liters — a solid ratio for its temperature class, if not as extreme as a minimalist UL bag. The ten-year warranty signals confidence in the Loft Nylon DWR+ shell construction.