The rating UK retailers stock most Dunelm lists more 10.5 tog duvets than any other rating: 40 when we checked on 5 October 2026, against 27 at 13.5 tog and 25 at 4.5 tog. That says a lot about where the UK market sits. Retailers treat 10.5 tog as the one-duvet answer for most of the year, and Primark calls it "the …

What tog should your duvet be? Choosing between a 10.5 and a 13.5 tog duvet comes down to how cold your bedroom gets at night, more than the month on the calendar. The tog number on a UK duvet measures how well it keeps heat in: the higher the number, the warmer the duvet. This page puts the main UK retailers' seasonal …

Is a 13.5 tog duvet warm enough for a British winter? For most people, yes. Which?, which tests duvets with a panel of 40 testers, says a tog of 10.5 to 15 is better for winter, and that "while 15 is the maximum, most people find that a 13.5 tog duvet is warm enough for British winters." Primark gives the same answer …