Classique 50 White Duck Down & Feather Quilt by Downia is constructed from luxurious duck down & feathers which offers comfort and warmth due to the ability of down to hold warm air between its millions of tiny clusters. This white duck down and feather duvet with an all-seasons ‘3’ warmth rating is ideal for use in autumn, spring and mild winter nights. It has a cassette construction which prevents the fill from moving around for an even warmth at all times. Soft 233 thread count downproof cotton casing.