Knowing what are the differences between down types will help you to choose the perfect comforter. They are not made from all feathers but a combination of the filaments found under the feathers of ducks and geese and this is what keeps the birds warm as it traps air. It is a good filler and a great insulator and is lightweight.Some of the different types of fill include duck which is the most affordable, goose which is the best insulator, white goose which is the most luxurious and eiderdown white goose which is the best for blankets. The warmest fill is from mature geese. The softest and warmest is found in eiderdown.Natural fill has benefits that synthetics do not such as they block moisture and wick it away from your body keeping you dry, they naturally form air pockets to trap air and warmth dietrine and they are lightweight. The structure of the down gives them loft making them light and fluffy. You can use them in most any climate as they regulate warmth and breathe well.The higher the fill power number the fluffier and warmer the comforter. A good range to start at is 500, 600 is the best and 800 the highest. A high fill number indicates large clusters which translate to better loft and insulation. Fill power is measured in cubic inches per ounce.Allergies can be attributed to cleanliness ratings. Oxygen and turbidity are measured, the oxygen test shows how much organic material is left after washing and the turbidity test shows the amount of suspended materials. In America blankets must have an oxygen test rating of 10 or less to pass government regulations, the lower the number the better.
