It has a slouchy fit, so you can wear pyjamas or thermals underneath when the temperature really drops.

This snuggly grey koala onesie is the perfect lounge wear to settle down in after a long day for some seriously needed R&R.Arc’teryx’s Rho top works well for lower-output activities in colder temperatures. Our tester found this the perfect base layer for walking the dog in New York weather when temperatures were in the upper 30s. The proprietary “Torrent” fabric impressed our tester with how cozy and comfortable it was, while also excelling at temperature and moisture regulation. The “Polygiene” odor control also helps to keep you smelling fresh on the trail. Proving that onesies can be stylish as well as snuggly, this super-soft jersey onesie is the ultimate in luxury loungewear. The drawstring waist means it looks a little smarter than your average onesie, but is still super comfortable when you fancy a really lazy day.

The hood is good for chilly evenings too, and it’s easy to slip on and off, with a zip that reaches to the hips. If you love M&S’s iconic pink pig as much as we do, this novelty onesie is the one to go for. Sure, you can’t wear it if you have video meetings, but it’s cute and fun, and you’ll smile every time you catch yourself in the mirror. The Hush onesie is expensive though, so for a more affordable option, Dunelm’s Teddy Bear Feather Soft Marl Onesie is an ultra-snuggly option. Do you wear anything under a onesie? Our tester took Under Armour’s UA Base 3.0 set on multiple hikes and runs in 30-degree temperatures, some up to three hours long. The upshot? These base layers excel at providing warmth and breathability but do not stretch as well as others, despite advertising four-way stretch. Not surprisingly, considering the brand, our tester found this thermal underwear performed best while engaging in high-output activities in the cold. Love it or loathe it, winter is here, and with it comes cosy evenings in, and mornings snuggled up at home - and what better to wear for those comfy occasions than a soft, fluffy onesie? Not just for leisure time, onesies get a big thumbs up from us when it comes to keeping warm when you’re working from home too (provided you have no video meetings…) Not to mention it's a great gift option for Christmas.

Since 1982, our company has been carefully manufacturing our flagship Extra Warm Thermal Underwear range at our own factory in Leicester (England, UK). In addition to this, we also offer some competitively priced options which are made at our foreign facilities, but everything continues to be proudly designed and quality controlled in the UK.

Our favourite features? Fans praise how soft and cosy it is, with many impressed by the bright colour, too. Sizes: XXS - XL | Colours: Navy | Materials: 79% Lenzing™ Ecovero™ Viscose, 19% Polyester, 2% Elastane Reasons to buy Absolutely, there are endless options for onesies for adults, as shown in our edit of the best onesies for women. You can even buy matching onesies for the whole family, be it for Christmas, birthdays or family trips. How onesies can help cut heating billsTrue to Carhartt’s reputation, the Force Micro-Grid Base Layer Top (and matching pants) were incredibly warm and durable when our Northern California-based tester took them out for some early-season snowboarding at Lake Tahoe. The Force set features 100 percent polyester construction with a grid system that reminded us of Polartec’s grid fleece material. Our tester reported snowboarding when temps were around 30 degrees using just a shell. After testing base layers from well-known and noteworthy brands, Patagonia's Capilene Air series came out on top thanks to superior temperature regulation, comfort, and fit. A close runner-up with a functional half-zip design was the Kari Traa Rose Set. Our favourite features? This is the perfect onesie for Harry Potter lovers, complete with inner lining in Gryffindor’s iconic colour scheme. The zip reaches to just below the belly button, so this is easy to step in and out of, plus it has ankle cuffs to ensure you feel extra cosy. It has a snuggly hood too. Secondly, think about whether you want to wear pyjamas or thermals underneath your onesie, or just underwear. If you plan to wear clothes underneath it, size up.

Our favourite features? Perfect for keeping warm at your desk, lounging in of an evening, or even using as nightwear, this is a versatile onesie that will see you right through winter. Sure, you’ll look like you’re off to a teddy bear’s picnic in this super-soft onesie, but you’ll also be cosier than you’ve ever been. Choosing the best women’s onesie is down to personal choice, but there are a few things to consider before investing in your cosiest outfit yet.Our favourite features? Extra points go to this luxury onesie because if you’re on a video call, it could be mistaken for a chic top, meaning no colleagues need know that you’re cosy in your loungewear. Finally, we cross-referenced all of the above information to find the best onesies for women that had won the most accolades and recommendations across the board to bring you a selection of the best ones at various price points. We think there’s something here for everyone. Why you should trust us