Heatwave® Pack of 2 Men's Thermal Trousers Long Johns Warm Underwear Baselayer, S M L XL XXL Thermals

Product Information

Outside of the fabric weight, the materials themselves are going to have the biggest performance impact on your thermal underwear. The materials are much the same as any you would find in outdoor wear, with the exception of cotton and silk, though it should be noted that cotton base layers aren’t suitable for any kind of high output outdoor activity but is included on this list for being a comfortable and affordable alternative in terms of being an effective insulator. Merino Wool

In many ways Merino is the highest quality option, tending to really drive the price up–it has the unfortunate consequence of also being among the least durable of the fabrics. The name “long john” is supposedly a reference to the late 18th century heavyweight boxing legend John L. Sullivan, who favored wearing them in the ring.Long johns and by extension, other base layer categories, almost always have their fabric weight rating listed somewhere. The categories might not be hard-cut but are a dependable place to start your search barring no strong specific preference. Long underwear, colloquially known as “long johns” are the bottom component of what is now referred to as a “base layer”.

These may be your best option if you’re looking for something to lounge in, what immediately comes to mind is sitting on the sidelines of a football field in late October, long after the sun has set. Extreme VariationsYou might opt for midweight long johns as something to wear around the fire when fall camping. Patagonia Capilene is a great thermal underwear for this. As skiers and snowboarders, we can’t deny the quality of merino, as well their effectiveness even when slightly moist from sweat. For hiking too, they’re a proven commodity. Bringing a “best of both worlds” attitude to the table, blends tend to be among the most expensive and performance oriented options out there. Pros Midweight long johns tend to be a bit more limited by both hard work and warm temperatures, but they aren’t totally out of the question for more mild activities like snowshoeing or alpine skiing when the weather is a little colder. Because of their extreme insulative properties, these thermal underwear won’t breathe at all, and any amount of prolonged exertion is likely to result in an uncomfortable sweaty mess.