Down sleeping bags are light and warm. However, down may lose its excellent insulating properties, if it clumps due to wetness or excessive pinching during packaging. Synthetic undersuits take up more volume, they are heavier and not as comfortable as down. However, they also warm up when wet and dry much faster than down.
In down sleeping bags, intended for camping in low temperatures, down is poured into special partitions, to keep it from clumping.
On the tab
Long pockets overlap in such sleeping bags, which leave a lot of space for an insulating layer of air.
Quilted inside out
For inside out quilting, the undersuit is in separate pockets. This method has this disadvantage, that heat escapes at the seams of the sleeping bag.
The use of shifted layers of quilted material prevents the undersuit from clumping, and at the same time protects against heat loss at the seams.
TAKE CARE OF YOUR SLEEPING BAG
Before laying it on the bedding, shake off the sleeping bag well, so that the undersuit is distributed evenly, and after sleeping, remember to air the sleeping bag. If the outer material of the sleeping bag tears, this place should be sewn together as soon as possible, so that no bigger hole becomes. You can temporarily patch the hole with a wide adhesive tape. Pieces of spare backpack patches are also suitable for this purpose, which is usually made of a similar material.
A set of basic sewing utensils is essential, to be able to fix the sleeping bag, tent or clothing.