Duck Feather all seasons double duvet is a combination of a 4.5 tog & a 9 tog duvet which can be used separately in warmer months & fastened together for a 13.5 tog winter duvet. The duvet is made from a luxurious blend of 85% white duck feathers with 15% white duck down for added softness & warmth. The perfect option for those who prefer weight with warmth, the duvet gives a comfortable 'tucked in' feelling. The individual pocket construction eliminates cold spots & the need for daily shaking, ensuring the filling remains in place. The natural fill duvets have 100% cotton percale cover for breathability & softness.