Four sizes: Choose from single, double, king or super king sizes. Duck feathers: Filled with shredded duck feathers and down. Soft: Inside an anti-allergenic 100% cambric cover. Duvet: Get a 10.5 tog winter duvet. Anti-allergenic: Feathers are steam treated before being used. Luxuriously plump: Perfect for wrapping up warm this winter! 10.5 Tog Duck Feather & Down Duvet | Living Social