The highest tog duvet you can buy is usually 15 tog, although we have seen some all-season duvets (where two separate duvets of differing togs are combined into one warmer duvet) offering a combined warmth of up to 18 tog.

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. 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? Don't buy it if: your priority right now is affordability or ease of care. Although we think it's well worth investing in the great night's sleep it offers, there's no denying the price is prohibitive, and this duvet is dry clean only.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. Buy it if: you're looking for luxury as well as warmth. No duvet fill feels quite as sumptuous as down, and this 90% Hungarian goose-down and 10% goose feather option is one of the best. It's super warm, drapes beautifully, and feels super luxurious. The all-seasons option also offers brilliant versatility; use the 4.5 and 9.0 duvets separately in warmer seasons and combine when the evenings start to drop in temperature to create 13.5 togs of winter warmth. Plus, although it's an investment, the all-seasons design means you'll also be kitted out with cooler tog duvets for spring, summer and autumn. 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. During the summer and spring, the temperature normally rises. This can naturally affect your sleep by making you feel too hot under your regular duvet. Even though a good duvet helps absorb moisture, breathes and offers good ventilation it can still insulate too efficiently for a warm night. A good solution is to have a cooler summer duvet that helps you keep the cosy feeling of wrapping yourself in a quilt, but without making you feel overheated. Choose one of our cooler duvets as a summer duvet if you know that you tend to sweat and get hot during warmer nights. Choose the right material and filling Except choosing the warmth rating of your duvet you can also choose between different materials with different advantages and characteristics. Cotton, polyester, lyocell and polypropylene mixes

Microfibre– the 'luxury' version of hollowfibre, a microfibre fill is made of much finer strands of polyester resulting in a very lightweight duvet with a, yes, more luxurious feel. Some compare microfibre to the feel of down, but it has the upside of not running the risk of animal cruelty. However, again, being made of synthetics, the environmental impact of production and disposal is a concern. Like hollowfibre, microfibre can also cause overheating. Everyone likes a different type of duvet. Some of us want to feel weighed down with a warm and heavy duvet, others prefer their duvets cool and lightweight. A good duvet will be made from breathable material to keep you dry and your temperature steady throughout the night. The perfect duvet will also feel ‘just right’ in terms of weight, size and form. Sounds like a lot to consider. Fortunately, we offer duvets for every preference – ensuring you’ll find one with just the right weight, warmth and ventilation for you. Summer duvet – a duvet for each season? 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.Don't buy it if: the price makes your eyes water. As well as being the softest duvet fill, down is also the most expensive fill, and 90% Hungarian goose-down is pretty much the best quality you can get. If you're a hot sleeper or suffer from night sweats then you might find down too warm; opt for a more breathable wool-filled duvet instead to avoid overheating. And, if you're vegan, then the feather and down fill won't be for you. 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.