Simba, the brand behind some of the best mattresses on the market at the moment, also have a clever duvet that boasts a range of impressive features, starting with some notable eco-credentials. The duvet's Renew filling is 100% constructed from recycled PET bottles, while the duvet's cotton is responsibly sourced. On top of that, the duvet is manufactured with energy from certified renewable sources, in an Eco factory. Phew. This duvet offers the best of both worlds for all year-round satisfaction, with an eco-friendly angle because unlike the all-year duvet above this design is made from an alternative filling. We favoured this duvet primarily due to the different weight options, with a 3-4.5 tog (175g/m²) duvet for the summer, and a 10.5 tog (300g/m²) duvet for in-between seasons. You tie the two different duvets together to form a combined weight of 13.5 tog to act as a heavier winter duvet. If you're looking for a duvet that doesn't rely on feathers or down for warmth yet also doesn't feel (or worse, sound!) synthetic, search no further. The White Company's innovative Down Alternative Duvet offers a truly unique bed cover that feels as if it should be filled with down or feathers, but in fact, is filled with something quite different. This eco-aware duvet is stuffed with Smartdown, a fine recycled fiber that's super-cozy, despite its non-natural properties.

How? Each half of the duvet is treated as its own entity, with a spectrum that spans from Extra Cool (4.5 tog), Chilled (7.5 tog), Cozy (10.5 tog) and Toasty (13.5 tog). It's worth noting that you can go no higher or lower than one temperature tier across the two halves: for example, it's impossible to have a 4.5 tog left and 13.5 tog right. (Single-temperature duvets are also available to buy.) Which season are you buying for? Whether you're buying in advance or looking for a great new duvet to start using ASAP, be mindful of the time of year you'll be using it in. "For regular sleepers, a 10.5 togduvetshould be good for all-year-round," says Davey. "Some people prefer to change theirduvetset-up as the seasons change. If this sounds like you, look forduvets that have the option to separate into two parts, meaning you can have a cooler 10 togduvetin the summer, with the option to attach the additionalduvetlayer for the winter to convert it into a 13 tog."

What is a duvet tog?

Ensuring the duvet is kept dry is also crucial. Clean up any spillages ASAP, and make sure your bedroom is damp-free and warm to promote a dry atmosphere within the duvet, rather than one that encourages the growth of mold and bacteria. Another added bonus? Despite its impressive features, this duvet can be easily bunged in the washing machine at 40C for an instant freshen-up. Anyway—the really amazing thing about this duvet is the engineering that lies behind it.It features Stratos, an ingenious temperature regulation system that is inspired by the needs of astronauts in space. Capable of storing and releasing heat, it's ideal for keeping you cool on hot nights and toasty-warm on chilly ones. We tested it in late November and as well as feeling as if we were lying underneath a cloud, it also managed to keep us feeling comfortably warm all night long. You really can't go wrong with Silentnight, whose bedding prowess has you covered with everything from mattresses to pillows. The brand's Hotel Collection Duvet is every bit as decadent as it sounds and is ideal for adding a five-star touch to your bedroom—just without the price tag.

What materials are involved? A range of materials are currently used in the creation of duvets, with everything from natural down or polyester to organic cotton and recycled material. These can be used for both the exterior of the duvet as well as its filling. "Once you've decided on the tog of theduvet, you'll have a selection of different materials and fillings to choose from," Davey explains. "We would always recommend looking out for the most natural options, so opt for cruelty-free feathers and down, or sheep wool, encased in organic cotton, where possible."

The 100% organic cotton cover and the anti-mite quality gives peace of mind that it won't be allergies keep you awake at night. The duvet cover is a hexagonal design with a double-stitched reinforcement that feels full and comforting to the touch, even when covered with a duvet cover. All components are machine washable at 40-degrees which is handy, to ensure freshness for every season. Comes in a What should you consider before buying a duvet? The duvet does sit at one of the higher price points on our list, which might be frustrating if you're keen to make a non-feathered choice but simply don't have the budget to match. However, there are lots of reasons why it makes a solid investment. With The White Company synonymous with top quality, you can be confident it will last (it comes with a five-year guarantee).And despite the fact it's down-free, you really wouldn't notice it; we found it every bit as soft, snug and enveloping as its feather-filled equivalents.

There most common duvet fillings available are down, wool and feathers, but options also vary from natural to synthetic. There are a range of factors that are worth considering before you splash out on a new duvet for your bed, advises Rob Davey, sleep expert at Snoozel Green. These include:At 10.5 togs, it's the perfect weight for using throughout the year, whether you use it on its own in the summer or layer it up with blankets as the months get cooler. The duvet features a sleek embossed finish, which we thought looked great: it's almost too elegant to conceal under a duvet cover. (Hey—we said almost...) This will also allow it to breath, and keep the fibers aerated and mold-free," says Davey. "Natural fiber sheets, such as cotton andbamboo, are great options." The duvet is delivered in a material bag that we thought would be ideal for storing it (or other bedding) in in warmer months. All in all, yes, it's expensive. But its price feels fully justified, and it's a worthy winner of the "best luxury duvet" title.