Winter Down Jacket
A down jacket is a jacket which has been insulated with the soft and warm under feathers from duck or geese. Down is a fantastic insulator as the loft (or fluffiness) of down creates thousands of tiny air pockets that trap warm air and retain heat, thus helping to keep the wearer very warm in cold winter weather.
The down fill of a jacket will be either goose down, duck down or a combination of the two. Goose down is often regarded as the warmest and lightest but duck down jackets, or jackets with a combination, are often cheaper.
A super lightweight down jacket will be made with a thin, light material for the outer shell. Although ideal for reducing weight they can be more vulnerable to snagging and abrasions. This type of jacket is great if you are wearing it now and again on cold days. If you are looking for a jacket to wear regularly for many years to come, it is worth looking for a slightly heavier and thicker outer shell that will last far longer.