One Look Clothing Mens Thermal Onesie All in One Zip Up Black Charcoal White

Product Information

Ibex might be a lesser-known brand than Smartwool, but the brands are quite similar in terms of thermal underwear. You'll want a synthetic or lighter-weight merino wool blend for higher-output activities like running, cross-country skiing, or backcountry skiing. One of our favorite options is merino wool; a go-to pick for most outdoor enthusiasts because of its natural moisture-wicking, temperature-regulating, and odor-preventing properties. Not surprisingly, considering the brand, our tester found this thermal underwear performed best while engaging in high-output activities in the cold.

But if you’re looking for thermal underwear for highly specific activities like running or cross-country skiing, or if your climate isn’t super cold, consider a lightweight layer.

Testers rated thermal underwear on comfort, fit, warmth, moisture-wicking ability, durability, and value while also considering temperature regulation.

Testers wore the thermal underwear while engaging in a slew of activities from skiing to snowboarding, hiking, running, walking, errand-running, and attending outdoor festivals. Our testers are based across the country, from New York to the Midwest and California, and also took the thermal underwear on trips with them.Originally from Steamboat Springs, Colorado, the brand has its roots in creating products for outdoor winter activities in sunny, cold conditions. 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 moisture-wicking fabric keeps you from getting chilled after exertion, and we were impressed with the base layer's ability to stay fresh even after being worn multiple times without washing. Heated gilets are another option for warming just yourself rather than spending money heating the whole house during the day. 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.

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. 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. 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.

The Woolies 2 line from Ibex features 100 percent merino wool and a very minimalistic yet effective design and construction. As Martin Lewis said, it’s easier to heat the person than the home, so if you’re home alone during the day, rather than spending money heating the whole house, it’s worth layering up in a onesie to conserve warmth.

But a midweight merino wool base layer is probably best for resort skiing, hiking, lounging, après, or dog walks. The term base layer tends to be used when considering more technical layering or higher-output activities like running, climbing, or backcountry skiing. 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? I like the top because it could easily transition from the trail to lunch or from the ski slopes to après.