The down sleeping bag is the most desirable type of sleeping bag, primarily due to the use of natural filling materials such as feathers and down. This filling makes the down sleeping bag the warmest type of sleeping bag available on the market. Duck or goose feathers are used in the production of such models, which provide very good thermal insulation. Natural down is characterized by lightness, softness, durability, as well as the possibility of high compression. Down jackets are mainly associated with travel to demanding, frigid areas where the temperature drops below zero, but they can also be successfully used when camping in milder conditions.
The ability of a down sleeping bag to provide thermal comfort depends on the ratio of down to feathers. In the case of winter sleeping bags, it is a ratio of 90/10 (down/feather) or 80/20, while autumn and summer sleeping bags are about 70/30 or 60/40. From the above data, it is clear that the more feathers, the warmer our sleeping bag will be. Down sleeping bags are characterized by good compressibility, making them easier to pack. In an ultralight down sleeping bag, the ratio of down to feathers can be as high as 92/8. This type of down sleeping bag will be great for multi-day mountain expeditions.
Nowadays, down is treated in sleeping bags to strengthen its resistance to moisture. Nonetheless, a down sleeping bag should be used with caution when humidity is high. First of all, it is necessary to air it regularly, and to pay attention not to pack a damp or wet sleeping bag into a carrying bag. Its washing and drying should also be approached with more care. Although caring for a down sleeping bag can be demanding, there is definitely no better choice when you are looking for a top-notch sleeping bag.
