Winter duvet: A fantastic winter duvet made to British UK standards for guaranteed warmth. Filling: Generously filled with 85% natural soft white duck feather and 15% duck down. Duvet: Get a 15 tog duck feather and down duvet. Cover: The cover is made from 233 thread count soft brushed micro fibre fabric. Sizes: Single, Double, King or Super King. Features: Pocket baffle stitched to maintain an even spread of feathers - eliminating cold spots so it drapes comfortably over the body for a sound nights sleep. 15 Tog Duck Feather & Down Duvet | White | Living Social