This White Goose Feather & Down Collection Combinational Duvet is made from a 100% natural filling containing 85% White goose feather & 15% White goose down for warmth without weight. This duvet has a 9 tog rating & comes with a removable 4.5 tog duvet making the duvet cooler for the Summer months & warmer for the Winter. This duvet has a 100% cotton case for added comfort & is all you need to help you achieve a sensational feeling.