The ideal tog for winter depends on various factors such as the temperature of the room, personal preference, and the type of insulation in the house. Generally, duvets with a tog rating over 10 are ideal for winter, but lower ones may be suitable for sleepers who get hot at night. Here is a breakdown of the different tog ratings:

• 1, 3, and 4.5 tog: ideal for use in summer and for those who get hot at night.
• 10.5 and 12.5 tog: for use in colder seasons.
• 13.5 and 15 tog: for those who need the most insulation during the colder seasons.

According to Baby Loves Sleep, a tog rating of 2.0 TOG or 2.5 TOG is suitable for the colder winter season, with appropriate clothing and bedding, and for homes that dont have much heating. However, the ideal tog for winter may vary depending on the individuals preference and the temperature of the room. It is important to find the right balance between warmth and breathability to ensure a comfortable sleep.