Whether you’re an alpine skier, cross country skier, ice skater, an all-season hiker, runner, or spectating from the sidelines, we can help you get back out there with our amazing thermal garments perfect for wearing under your outer layers. You will need to consider how you will layer your clothing and the lowest temperatures you will expect on your trip. This is why it’s recommended to opt for long johns that are a mix of cotton and synthetics, rather than 100% cotton. They’re good for moderately cold to cold weather and best used in fall and spring or with additional layers in winter.

In New England and other places where the temperature drops, thermal underwear becomes an important (if not integral) part of one’s wardrobe.

If you enjoy warmth but not the bulk, rest assured knowing our thermal underwear fits comfortably under clothing. Merino wool long johns are more expensive, but they’re also warmer, breathe better and dry more quickly. Just like base layer tops, long johns come in four different types of fabric—synthetics, cotton, wool and silk. From morning hiking trips to multi-month cycling adventures, he has plenty of experience venturing into the wilds of the world.

Heavy-weight long johns, also known as expedition-weight long johns, are the thickest type of underwear available. In our selection of quality long johns for men, we carry thermal tops, bottoms, and even hard-to-find union suits. In this article, we’ll walk you through how to choose the best long thermal underwear and show you our selection of the best models available. We have super-soft cotton layers, moisture-wicking merino wool, and even silk long johns for you to choose from.Cotton long underwear is also a suitable base layer if you don’t plan on doing anything strenuous that will cause you to sweat. With that in mind, take a look at our thermal underwear options and spend more time outdoors with increased comfort.

Merino wool is essentially a fancy type of wool made with fine fibers of wool from a specific breed of sheep.

Silk long johns are good for outings in moderately cold weather, but they won’t suffice when it gets extremely cold. Synthetics include polyester and polyester blends, which can consist of spandex, nylon or polypropylene.

Whether you are an outdoor enthusiast or prefer to stay indoors during the cold weather, insulated underwear is extremely useful.Layering right allows you to remove and add on clothing as your body temperature fluctuates during activity. The only real downside of merino wool is that it’s a delicate material, so it is less durable than the synthetic and cotton options. In warmer conditions, it’s better to opt for loose-fitting clothing, which allows for more air circulation.