10.5 Tog Goose Feather and Down Duvet, available in all UK standard sizes. Available in 10.5 and 13.5 Tog, Single, Double, King and Super king. It’s our most versatile, popular pick. Filled with 85% goose feather and 15% goose down, this duvet is encased in pure cotton for an added touch of luxury; the 230 Thread Count 100% Cotton Cambric cover has a cassette pocket construction which ensures an even spread of the filling, so the warmth is evenly distributed with no cold spots while preventing any leakage during the night, providing sound sleep.