Quick Answer
LONG UNDERWEAR MAKES A SIGNIFICANT DIFFERENCE IN COLD EXPOSURE, HELPING TO SLOW DOWN BODY TEMPERATURE LOSS BY UP TO 40% WHEN COMPARED TO WEARING ONLY A T-SHIRT OR TANK TOP. THIS IS DUE TO ITS ABILITY TO RETAIN BODY HEAT AND ISOLATE THE BODY'S CORE FROM COLD AIR. A WELL-FITTING PAIR OF LONG UNDERWEAR CAN HELP EXTEND EXPOSURE TIMES IN COLD WEATHER.
Layering Techniques
When it comes to cold weather, layering is key. The base layer, or “next to skin” layer, is where long underwear comes in. This layer should be made of a moisture-wicking fabric, such as merino wool or synthetic fabrics, to draw sweat away from the skin and prevent it from making you colder. A good rule of thumb is to wear a base layer that is 80-90% of the moisture-wicking fabric and the remaining 10-20% is a thermal fabric for long underwear. This allows for optimal temperature regulation and moisture management.
Fabric Choices
When selecting long underwear for cold weather, it’s essential to choose a fabric that will help retain body heat. Merino wool is an excellent choice due to its ability to regulate temperature, wick moisture, and provide natural insulation. Look for long underwear made from merino wool that is at least 150-200 grams per square meter (gsm) for optimal warmth. Synthetic fabrics, such as polyester or nylon, can also be effective, especially when blended with moisture-wicking fibers. However, they may not provide the same level of temperature regulation as merino wool.
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