Having the right duvet is essential for a comfortable and healthy night's sleep. Tog of a duvet refers to the warmth and it’s one of the most important things to consider when choosing your duvet. The higher the tog the higher the warmth it offers. Synthetic filling is great for allergy sufferers or anyone who doesn't prefer feather or down. Feather & down create warm and snuggly duvets. We offer a variety of fantastic duvets to choose from based on the weather, your preferences of sleep, and the size of your bed. Single Size