This White Goose Feather & Down 10.5 Tog Duvet has a 100% natural filling 85% White goose feather & 15% White goose down for warmth without weight. The duvet has a cassette construction which eliminates any movement of filling for even warmth & weight distribution. This bedding has a 100% Egyptian cotton case for added comfort. Egyptian cotton is the hallmark of luxury bedding woven from exceptionally fine yarn with a crisp clean & fresh feel originated from the banks of the River Nile renowned throughout the world as the finest & all at “simply value for money”.