These beautiful, natural mattress toppers add approximately 1.5 inches of extra comfort to you bed, in addition to being a wonderfully warming layer. They have a platinum British wool filling and a soft, 100% natural cotton flannel case. The luxurious wool is unsullied by chemicals or bleach, and it does not require laundering - simply air once or twice a year. Handmade in Devon by professional seamstresses using wool from pure breed flocks of Texel sheep, they are a natural alternative to a down filled duvet. Devon Duvets wool duvets are a sustainable product, as the sheep are reared solely for their wool and return to the pasture after shearing. The unique natural properties of wool resist dust mites. Wool is also naturally breathable, helping to regulate body temperature throughout the night, all year round. Single to fit bed 90 x 190cm Double to fit bed 135 x 190cm Kingsize to fit bed 150 x 200cm Super kingsize to fit bed 180 x 200cm Please note: this topper is not suitable for use with an electric blanket.