Buy it if: you're looking for the very best duvet for a great night's sleep. This wool-filled duvet is an investment, but we've tried and tested some of the best winter duvets on the market, and in our opinion, this is the cream of the crop. It's the warmest we've come across, keeping our testers warm and toasty throughout the night without any of the overheating or night sweats that occurred with other high tog options. That's thanks to the naturally thermoregulating properties of wool that allow moisture to escape whilst still providing insulation. Handmade in Yorkshire using 100% traceable British Cheviot wool and certified organic cotton this is also a great eco-friendly option, with wool completely biodegradable. The first thing you should consider when looking for a duvet is the type of filling you prefer. Each filling has its own advantages and characteristics. For example, natural fillings such as down and feathers are breathable, lightweight, and provide excellent insulation, making them ideal for those who like a cosy, enveloping feel. Synthetic fillings, on the other hand, are hypoallergenic, easy to care for, and typically more affordable. These types of duvets are a great option for those with allergies or for those who cannot use natural materials. For most people, their bed is their sanctuary and there are key elements that play into the creation of that. You'll need an excellent set of pillows, some wonderful bedding, a supportive mattress and, of course, the best duvet possible. The latter needs to be something that you can snuggle up under during winter nights but also something that will prevent you from overheating in the summer months. Of course, it's a lovely idea that you might have a separate winter duvet and a best for summer duvet, but the average household simply won't have the storage capacity for this. As such, the best duvets will be ones that can do both. Feathers: Heavier than down, feather-filled duvets are slightly less insulating but still offer warmth and breathability.

Spend some time looking for a new duvet and you'll soon realise there are a whole host of duvet fillings available. From hollow fibre to goose down, synthetic to natural, the array of terms and materials can fast become a little overwhelming.Emily Attwood, founder of sleep-brand scooms agrees, ''We’d always advise a 9 tog to 13.5 tog for the winter months as this is ideal and will keep you warm. If your house is always on the warmer side, then a 9 tog duvet would probably suit you better throughout the winter months, and you wouldn’t want to go any higher. This will prevent you from overheating which can disrupt your sleep.' Don't buy it if: you really want to layer on the warmth. This 13.5 tog duvet is plenty snuggly enough, but we think the wool and down options just pip it to the post in terms of cosiness. That said, this synthetic option is far easier to care for as it's machine washable and can be tumble dried on a low heat setting.

Buy it if: you want an affordable winter duvet that still feels both warm and luxurious. This recycled polyester fill duvet has 10% silk mixed in, and whilst the proportion doesn't sound huge, it really makes a difference to the way this duvet feels, with a more luxurious touch and really nice drape on the bed, whilst still being lightweight. Even better it's a relatively budget buy, and made from certified recycled polyester from waste (like plastic bottles or manufacturing off-cuts) which helps the movement towards a more circular economy by reducing waste going to landfill. Compared with virgin polyester, recycled polyester helps conserve crude oil reserves during fibre production. It all comes down to personal preference but we would advise to invest in a duvet that has at least a 10.5 tog rating for winter. The tog scale goes from one to 18 in the UK - so, remember the higher you go, the more cosy and toasty your sleep will be. Warmth: Duvets have a "tog" rating, which represents their thermal insulation capabilities. A lower tog rating (e.g. 4.5) is suitable for warmer months, while a higher rating (e.g. 13.5) is ideal for cold winter nights. To help you get to grips with the basics, we've broken down the pros and cons of most common duvet fillings below. An all-season duvet is made up of two separate duvets of differing togs – one lightweight and one midweight – that can be attached together into one single heavyweight duvet or used separately. The idea being that you can mix and match to ensure you have the perfect weight duvet for spring, summer, autumn, and winter.Although it will mean spending a little more, and may depend on your bed frame height and style, we'd generally advise sizing up with your duvet, especially if you sleep with a partner. Then there are the more traditional, natural fillingsto consider. These range from all types of feathers and down to wool filling.