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Thermal Underwear

warm underwear

Maybe you're an avid extreme winter mountain trekker or you simply get the chills while working in the cool office, you operate heavy mining equipment year round or you work for the US Coast Guard. Either way, thermal long underwear, also known as base layer or long johns, may be just what you need to stay warm and comfortable. The type you choose will depend on your activity level, your budget, and the temperature.

There are many types of thermal underwear but our customers usually choose one of these three.
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#1 Merino Wool #2 Polypropylene #3 Cotton
• Our Warmest Thermal Underwear
• No Itch, No Odor
• Very Soft & Comfortable
• Wicks Moisture Away From Your Body
• Warm Even When Wet
• Natural Materials, Environmentally Sustainable
• Warm While Wet
• Less Expensive
• Long Lasting
• Moisture Wicking
• Fast drying
• Less Expensive
• Natural fibers
• Comfortable on Skin

Enjoy FREE SHIPPING on any orders over $100 and FREE returns on all orders.

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Thermals Keep You Warm And Comfortable in the Winter Cold

Most people don't realize how much more comfortable they would be if they had on a pair of thermal underwear. We love the comments we get from our customers who wear their thermals more often than they ever imagined they would. They say the long underwear is comfortable and keeps their body temperature better regulated.

What Type of Thermal Long Underwear Should I Choose? How Does the Technology Work?

Thermal underwear designers use the latest technologies and the oldest materials to:
• Keep you warm
• Keep you dry
• Keep you comfortable

Here are a few examples to help you choose the right thermal solution for your situation:

High Activity Levels, Very Cold Temperatures: You're cross-country skiing and your activity level is very high while the temperature is very low so you need a solution that wicks the moisture from your body while keeping you warm. Merino Wool is the very best technology for wicking moisture and warmth. You do need to be careful not to get it too heavy, causing you to overheat so we recommend medium weight 100% Merino Wool Base Layer by Minus33.

Low Activity Levels, Very Cold Temperatures: If you are the person sitting at the table taking registrants outdoors at the cross-country skiing event, your activity level will be low, yet it's probably a low temperature. You are less concerned about wicking moisture and more concerned with staying warm since you aren't moving around a lot. Heavy weight merino wool thermals are perfect for keeping you comfortable and warm.

Medium Activity Levels, Cool Temperatures: Let's say you like to hike in the hills or mountains on nights or weekends year round but as the temperatures drop in the fall or winter, you get discouraged by the cold. You need a light-weight merino wool moisture wicking long underwear that takes the edge off while not causing you to overheat.