Wondering which quilt or doonafilling to choose? This choice will be partly based on personal taste, budget and allergy aspects, with some people unable to use natural fillings due to allergic reactions, however it is always worth knowing what effect filling type can have on duvet warmth and thickness too.Natural fillings, like goose down quiltsand duckfeathers, or even wool quilts, are known to provide a higher level of warmth as feathers are naturally capable of trapping air. Feather quilt also provide this level of warmth with less thickness, unlike synthetic hollowfibre and microfibre doona which tend to be a little thicker for the same level of warmth.However, on other side, when you compare a natural and synthetic doona of the same warmth rating, the synthetic quilt or doona is likely to feel lighter, which is preferable for some. This is worth bearing in mind when choosing your doona, as two doona of the same tog but different types of filling may vary greatly in how they feel to sleep under. Depending on your choose the are available in many sizes but not least includingdouble bed quilts, queen quilts, king quilts,super king quilts. Or otherwise separated in either winteror summerquilts doona varieties