Filled with natural materials, this duck feather and down duvet combines breathable year-round comfort with a luxuriously lightweight texture. Its all-season design includes two breathable layers. Choose the 4.5 tog layer for summer sleeping or switch to the 9 tog option for cooler nights. When the coldest weather arrives, you can fasten the pieces together with the handy poppers for 13.5 tog warmth. A pure cotton outer provides a soft handfeel.