Likewise, if the purpose of your thermal underwear is to stand or sit outside for long periods or you live in an exceptionally cold climate, consider a heavier-weight pair.

The cuffs and tapered sleeves feature ribbon trims and there's a large, kangeroo pocket for added convenience.We spent weeks hiking, running, skiing, and lounging in 22 pairs of thermal underwear to find the best pair for you. But one thing we like about this set of thermals is they come in a wide range of sizes, including plus sizes, so it should be easy to size up a bit. Odlo's Performance Wool Base Layer set has an interesting blend of mostly merino wool with a touch of polyester, polyamide, and elastane. The term base layer tends to be used when considering more technical layering or higher-output activities like running, climbing, or backcountry skiing. For more stylish ways to stay warm both inside and out of the house this winter, check out our guides to the best women's dressing gowns and the best heated gilets.

You'll want a synthetic or lighter-weight merino wool blend for higher-output activities like running, cross-country skiing, or backcountry skiing.Since 1982, our company has been carefully manufacturing our flagship Extra Warm Thermal Underwear range at our own factory in Leicester (England, UK). It has a slouchy fit, so you can wear pyjamas or thermals underneath when the temperature really drops. You can find out more about our use, change your default settings, and withdraw your consent at any time with effect for the future by visiting Cookies Settings, which can also be found in the footer of the site.

The outside is ultra-soft black fleece, with delicate gold embroidery on the back, reading School of Witchcraft and Wizardry, plus it has a fun witches hat inspired hood, two deep striped pockets and red cuffed sleeves and ankles, for more stylish detailing. The Midwest winter wind and freezing temperatures tried to ruin my outdoor ice skating adventure, but the layers kept me warm and protected against the cold while also wicking away any sweat from ice skating,” our tester reported. The Force set features 100 percent polyester construction with a grid system that reminded us of Polartec’s grid fleece material. For any expectant or new mums, fans of this onesie rate it for taking in your hospital bag and wearing in those early newborn days.It’s really soft and super comfy, easy for breastfeeding and fits well around my bump,” one reviewer wrote. We then averaged those scores to determine our winners across a range of categories from Best for Skiing and Snowboarding to Best Multi-Use. Ibex might be a lesser-known brand than Smartwool, but the brands are quite similar in terms of thermal underwear.