Warmest thermal underwear

Keep comfortable and warm no matter how cold the weather gets thanks to thermal underwear.

If you purchase an independently reviewed product or service through a link on our website, Robb Report may receive an affiliate commission. Something happens this time of year, when the temperatures start to drop and the days get colder and colder. At least where I live in the Northeast, it feels like I become more intentional about what I put on myself each day. Enter thermal underwear. Now, thermal underwear is sleek and form-fitting, and offers high performance.

Warmest thermal underwear

Need new long underwear bottoms? We've been testing them for over a decade and showcase 13 of the best options in this review. Our team of experts spent months, in every season, taking these layers on river trips, ski slopes, cold winter trail runs, long multi-pitch climbs, and multi-day backpacking trips. We sought out different climates to determine which pairs are best for warmer seasons and which are best to wear through the coldest depths of winter. We backed up our field research with objective, laboratory-style tests designed to analyze specific features and offer this comprehensive, unbiased review to help introduce you to your next pair of long johns. We test both men's and women's versions of most apparel categories. Explore our in-depth testing by female reviewers in our women's specific long underwear review. Then, check out our writeup on the best base layer tops to see what to pair with the bottoms reviewed here. Finally, pick out some top-rated cozy socks , and you'll be well on your way to adventure-ready. Editor's Note: We updated this review on December 5, , to add new products from Patagonia and Mons Royale, and offer alternative recommendations against our current award winners. This combined warmth and comfort of this long john are excellent when the temps really dip down. You'll find rear gussets to match the front, enhancing comfort and fit. The extra-wide, wool-lined waistband and full-flatlock seams cut down on any common complaints of itchiness. While these are designed specifically for cold conditions, their balance of warmth and breathability makes them versatile even when temperatures begin to warm up a bit.

Our Top Picks. One highlighted how everything stayed in place without bunching, and another was shocked at just how warm warmest thermal underwear felt in windy weather. Material: Merino wool, polyamide, and elastane.

We've been independently researching and testing products for over years. If you buy through our links, we may earn a commission. Learn more about our review process. Once winter comes, layering up is essential. Let's face it: Your new winter coat and cozy sweater just won't cut it when temperatures drop below freezing. That's why cold weather accessories like winter gloves , hats and warm socks are key.

All products are independently selected by our editors. If you buy something, we may earn an affiliate commission. Long before the days of electric blankets or electricity, period , the best thermal underwear was the only thing separating you from frostbite in the dead of winter. Even now, the appeal is obvious: swaddling yourself in sweaters , coats, beanies , and scarves might not be enough. Especially down below. Your legs are supposed to just survive with just a simple pair of undies and a layer of cotton, wool, or corduroy? But what kind you choose is a crucial decision. Because, yes, even long underwear isn't that simple.

Warmest thermal underwear

If you purchase an independently reviewed product or service through a link on our website, Robb Report may receive an affiliate commission. Something happens this time of year, when the temperatures start to drop and the days get colder and colder. At least where I live in the Northeast, it feels like I become more intentional about what I put on myself each day. Enter thermal underwear. Now, thermal underwear is sleek and form-fitting, and offers high performance. Bean number for chilly weekends in the cabin. Just like so many aspects of the general underwear and performance wear markets, thermals come in several different varieties and fabrications.

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Already subscribed? Base layer bottoms often only get pulled out when the cold of winter sets in, but even if they aren't used as frequently as tops, they can still be quite versatile. The Mons Royale Cascade Merino leggins are thin, very stretchy, highly breathable, and feature a thick, comfortable waistband. Others We Liked. What's not to like? Whether you're new to merino wool or a devoted fan, Smartwool's merino gear is some of the best around. Loose fabric weave provides incredible warmth retention, stretchy fabric is super comfortable next to skin, minimal stitching equals less chaffing. The fabric has a flexible, comfortable four-way stretch, and the silhouette is built with a stretch-mesh gusset that comfortably hugs your crotch while promoting breathability. What's the point of a good pair of bottoms if they don't pair well with anything else you own? The most breathable layers we tested, not so shockingly, are on the lighter side in terms of fabric weight. The half-zip neckline adds another polished touch, and it allows you to increase airflow after working up a sweat in the slightly compressing set. Active use: r Related Items.

We may earn revenue from the products available on this page and participate in affiliate programs. A quality pair of thermal underwear is one of the best investments you can make.

When the weather bites hard and you need a really effective thermal foundation layer, pick one of our Thermal Warmest Base Layers. Base layer bottoms are versatile, but warmth is a dynamic metric because we don't all run at the same temperature. Power tools. Why We Love It It hugs curves, muscles, and everything in between just right. Recently viewed products. However, you help offset external costs by opting for an all-natural product. If you are looking for that ultra-soft pair, perfect for getting after it or just hanging out and relaxing, check out the Smartwool Classic Thermal Merino and its lighter weight brethren, the Classic All-Season. Arc'teryx also makes a men's version. These bottoms found themselves accompanying us on trips to mountain summits, off-route fastpacking, and every day on our daily bike commutes and trail runs in the hills. Patagonia Capilene Good for more than just snowy weather, long underwear bottoms are a versatile add to your wardrobe. It has a smooth, athletic material on the exterior with a brushed inside for warmth and can be worn on its own or under another pair of pants.