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All Year Round Duvet Tog Sleeping comfortably all year round is achievable with the right duvet tog. However, some prefer to have a summer and winter duvet to make life easier and keep from the hassle of swapping and the storage. Young children require a lower tog rating because their smaller bodies struggle to regulate heat. They also require a low tog for safety as they can easily overheat. Winter Duvets are often classified as 'Togs' on their packaging. This is an indication of how well they encase heat. T