Marks & SpencerM&S Smart Wash & Dry 13.5 Tog Duvet

The M&S Smart Wash & Dry is the value baseline here: a 13.5 tog winter duvet with a 100% polyester fill and casing, indicatively priced from around £35 up to about £65 depending on size. Its whole appeal is easy care, machine washable at 40°C and tumble dryable on low, making it a sensible pick for spare rooms, students, children or anyone who wants warmth without spending much. It does not pretend to match down for loft or wool for temperature regulation, and the basic polyester fill is the trade-off you accept for the price, which is why it sits at the foot of a strong field rather than higher. If your room runs very cold, M&S also lists a warmer 15 tog version in the same range.