Thermal underwear, or so-called functional underwear, was initially only used by top level athletes and sportsmen. Nowadays, functional underwear is an essential part of every policeman's or soldier's gear and is particularly popular among outdoor and sport enthusiasts.
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Thermal underwear is perfect for winter sports, hinking, jogging, hunting, fishing, whilst on duty, at the shooting range, outdoors or for casual winter activities - simply whenever we need to stay warm and breathable.
Thermal underwear will make sure you stay comfortable during both physical or passive activity, both in colder or warmer temperatures. We choose the most suitable combination of functional clothing with respect to what activity we want to perform as well as to which season of the year it currently is. With that in mind, we choose the most ideal number of layers. Very importantly, it is essential to always use the right number and combination of functional underwear so that the whole set remains breathable.
One of the main aspects that ensures the correct functionality of thermal underwear is the material it is made of. As such, functional clothing is usually made of synthetic fibres or combined materials that contain a variety of fibres. These fibres absorb the moisture that we produce during physical activities and wick it away from the body. For instance, thermal underwear made of Merino wool and MOIRA are excellent at doing exactly so it is no surprise they have both surged in popularity in recent years.
The fibres essentially transfer excess heat to ensure an optimal body temperature. This is the main function of the first layer, which is worn directly on the body and which increases our thermal comfort. This will ensure that during demanding physical activities our back will not sweat and our body is not going to overheat. Thus, it allows the body to better maintain its natural temperature.
The key to ensure the most effective functionality of our thermal underwear lies in the correct layering. It is very important to keep in mind that a poorly chosen second or third layer can interfere with the functioning of all layers.