When shopping for a bedding ensemble, all comforters and bedding items are important, but the comforter usually gets a little extra emphasis as it is what provides warmth while you are sleeping. One of the more popular kinds is called a down comforter, which is filled with small feathers that grow under the breast of a goose or duck. They provide great insulation and are very soft and fluffy, ensuring you will stay warm and comfy, especially during winter. As great as a down comforter is, the quality does come at a higher price. The more pure the down feathers contained within are, the more costly it will be.