Lancashire Textiles 16.5 Tog Extra Warm and Thick Winter Hollowfibre Cotton Blend Energy Saver Duvet. Designed to provide unparalleled warmth and comfort, this duvet features a perfect blend of hollowfibre and cotton for a cozy sleep experience. With its high 16.5 tog rating, it ensures maximum insulation, making it ideal for the coldest winter months. Experience the luxury of an energy-efficient duvet that not only keeps you warm but also helps you save on heating costs. Indulge in the plushness of a cotton blend casing that adds an extra layer of comfort. Embrace the winter season with a duvet that offers the ultimate balance of warmth, quality, and energy efficiency.