This winter duvet's soft feel of 13.5 togs will help to keep you warm and comfortable for a relaxing and restful night’s sleep. Super king, Double Bed Duvet Warm tog is hypoallergenic which means it does not contain any materials that are likely to cause allergies. The antiallergic warm winter quilted luxury bedding duvet tog is generously filled with hollow fiber and covered in microfiber that is soft to the touch to offer exceptional comfort throughout the night.