Down (from £60 for duck down, from £150 for goose down)
Pros Down provides superb warmth and draws moisture away from the body better than any other material. It's worth choosing one with the highest down content that you can afford. Try the Fogarty range of goose down and feather duvets, from £60, Debenhams.
Cons It won't suit allergy sufferers and can be pricey, but try Matalan or Dunelm Mill for great savings.
Silk (from £100-£250)
Pros Soft, super-comfortable and warm and a good alternative for allergy sufferers. Gingerlily specialises in silk bedding, with duvets costing from £110.
Cons Silk duvets are expensive and they'll require specialist cleaning, but they feel great.
Synthetic (£20–£80)
Pros Made from fibres such as polyester and ideal if you suffer from allergies. They can be washed in most large (6kg +) washing machines to kill dust mites. A good-value warm and cosy option. For comfort and value, try the Perfect Balance range, from £40, from the Fine Bedding Company.
Cons Filling can become lumpy and will flatten down considerably unlike natural fibres. It won't fold around you as much as down.
Wool (£55-£200)
Pros Ideal if you're allergic to feather and down but still want a natural choice. Heavier than down but the springy nature means it keeps its shape for longer. John Lewis has a range, starting at £55.
Cons Because the fibres don't lie flat, it won't tuck around you as much as down duvet.
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