Cover: They have a 100% cambric cover keeping the filling firmly in place and are also box stitched to ensure the filling is evenly distributed Size options: Choose from 4 sizes - single, double, king or super king. Properties: The feather filling is steam treated to ensure it is anti-allergenic. Tog options: Choose from 3 tog options - 10 tog, 13.5 tog or 15 tog. Duvet: Get your hands on a goose feather and down duvet. Comfortable: High quality feather and down filling to guarantee a great night's sleep! Supersoft Goose Feather & Down Duvets | Living Social | Living Social