Natural double duvet in real duck down and feathers guaranteed for a cosy feel the 100 natural filling is treated with proneem anti dust mite protection a treatment using natural active ingredients with lasting efficiency wash after washa 120 gm duvet for the summer and another 250 gm duvet for in between seasons join the two together to form the winter duvet fasten with ties filling 50 duck down 50 feathers treated with proneem dust mite protection with natural active