Silentnight Winter Warmer Duvet in Single, Double and King sizes; 13.5 or 15.0 tog ratings A supremely comfortable and toasty range, Silentnight Winter Warmer Duvets are perfect for those long winter months when chilly draughts can interrupt your sleep pattern. The choice of 13.5 and 15.0 tog ratings are ideal for those who seek a more thermal drape to their bedding.Crafted from an anti allergenic durable polyester hollowfibre fill and a polycotton cover, this is an easy care range that's designed to offer luxury and longevity. 13.5 and 15.0 tog ratings available