Wilsa's Down 650 down is an excellent cold weather sleeping bag that is based on high quality materials ideal for high mountain hikes. Delivered in its compression bag, it will only take up 6.8 liters in your backpack. WILSA has developed a complete range of top-of-the-range down sleeping bags, based on high-performance materials (90% white goose down, microfiber envelope) and excellent manufacturing quality (compartments with micro-ventilated walls). All these elements make it possible to achieve exceptional levels of thermal performance and weight. This sleeping bag is a true concentrate of technology essential for your hikes/expeditions in cold weather!

Features of Wilsa Down 650 Extreme Cold Down

700 CUIN HIGH PERFORMANCE DOWN SLEEPING BAG
The down quality index characterizes the loft and down removal capacity. For this, we measure the volume in Cuin (cubic inches) of an American ounce of down (i.e. 28.35g). The more carefully the down has been sorted, the greater its fluffiness. The IDFB (International Down and Feather Bureau) establishes the maximum "fill power" at approximately 750 Cuin, a value considered inaccessible given the natural (down produced by animals) and technical (down sorting) constraints.