If you want to stay snug in bed no matter what the weather, the Simba Hybrid 3-in-1 Duvet is an incredibly good option. The versatility and innovation on offer means it is suitable for most sleepers – even hot sleepers – and chilly sleepers will love snapping the two duvets together for an ultra-cosy cover to keep them toasty when the temperature drops.

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.Read more in our guide to what tog duvet to buy as well as finding out when is the right time to switch to a summer duvet. What size duvet do I need? First up, it's synthetic fillings. These duvets are filled with manmade fibres, like polyester and polymide that are made from petroleum-based plastics.

Buy it if: you're looking for luxury as well as warmth. No duvet fill feels quite as sumptuous as down, and this Soak & Sleep Hungarian goose-down option is one of the best quality we've come across. It's super warm yet lightweight, drapes beautifully on the bed, and feels super luxurious – you'll instantly feel like your bedding has levelled up. The all-seasons option also offers brilliant versatility; use the 4.5 and 9.0 duvets separately in warmer seasons and combine to create 13.5 togs of winter warmth.The snap-together design is flawlessly simple, and Simba makes it even more practical by making the duvets machine washable. The duvets are easy to attach and separate, and they are also light, even with the two combined – it never feels too heavy and always keeps you warm. Meanwhile, the cotton cover adds breathability. Long thought of as the Holy Grail of duvet fillings, down creates a plump, squishy and super soft duvet.However, that luxury feel comes with a luxury price tag to match. If you're a hot sleeper or suffer from night sweats then you might also find this high down-mix fill too warm; opt for a more breathable wool-filled duvet like Floks Luxury British All Seasons Wool Duvetinstead to avoid overheating. As the name suggests, there are three ways to use the duvet – or should we say duvets– because this hybrid is actually two separable items.

Another solution is to opt for an 'all-season' duvet. This consists of two separate lighter tog duvets that can be joined together (usually by way of press studs) to make a warmer winter duvet. Most commonly an all-season duvet will include a 4.5 tog and 9 tog duvet that can create a 13.5 tog duvet once combined, or a 4.5 tog and 10.5 tog duvet that will create a warmer 15 tog combination. 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. That said, personally, we think 13.5 tog remains one of the best winter duvet weights, with some finding 15 tog can retain heat a little too much during the night and lead to overheating. Obviously, it isn't always convenient to have a different duvet for each season, so the middle ground of the 10.5 tog duvet is one of the most popular options. 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.

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Our all seasons duvets save you space and money, giving you ultimate flexibility. Who wouldn't want a 3 in 1 duvet? If you’re struggling to work out what the best tog duvet is to see you through summer heatwaves and plummeting winter temperatures then an all-season duvet could be the answer.