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Outdoor Base Layers & Thermals

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Do you want to know more about thermal clothing?

A very common trick to choose the right outdoor clothing is the famous three layer system. For outdoor activities it is advisable to dress in layers. This gives greater effectiveness and versatility, since it allows better adaptation to possible changes in temperature or weather conditions. Thermal clothing would be included within the group of the first layers, that is, those that are in direct contact with the skin.

How to choose thermal clothing?

The main function of thermal clothing is to evacuate the sweat to keep dry, thus avoiding the sensation of moisture on the skin and feeling cold.

The most used materials for this type of clothing are synthetic fibers (polyester, polypropylene) or merino wool. Synthetic fibers are cheaper and dry more quickly, although they can end up smelling bad. Some garments incorporate silver threads that prevent bad odors. In any case, we should avoid cotton. The cotton is very economical but soon it gets wet and takes a long time to dry. This means that if we sweat, we do not expel the sweat and the body cools down.

Thus, the first layers must fulfill the following functions:
- Drainage of sweat and moisture.
- Heat retention.
- Breathable.
- Antiallergic.

Generally these layers should be adjusted to the body but not tight, as they should allow us to move without difficulty.

Many brands have patented their synthetic fiber fabric for first layers. Even so, the best known are:
- Coolmax: polyester fiber that transfers moisture from the body to the outside of the garment leaving the skin dry. It is used in summer clothes.
- Thermolite: it is also a polyester fiber that will keep us warm and dry. It is used in winter thermal garments.
- Merino wool: a natural fiber with superior properties, not only of thermal insulation, but also of sweat absorption and quick drying, and also of resistance to bad odors.

By type of product, among the thermal clothing we can find tight and elastic garments, both to cover the upper body and the lower part: shirts , long tights , etc.


Opinions featured in Outdoor Base Layers & Thermals

Slip Craft Greatness black white
Slip greatness
Good fit and quality
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Finisseur Thermal Short Sleeve Base Layer Black
Great Baselayer
Ideal for cold days, but not cold enough for long sleeved layer
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Finisseur Micromesh Sleeveless Base Layer Top Black
Good quality and very light
Order a size up I’m usually a medium but the L/XL is a perfect fir
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Finisseur Micromesh Short Sleeve Base Layer Top Black
fabric quality
excellent item and fabric for running
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Finisseur Thermal Short Sleeve Base Layer Black
Thermal top
Keeps the torso warm in fair weather, yet to try it on a colder day
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Gore Wear Thermo Windstopper Undershirt Black
Excellent item
Good quality
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X-Bionic Invent 4.0 Long Sleeve Top Black
Item Fine Packaging Dreadful
Item fine. Packaging awful
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Icebreaker 260 Tech Long Sleeve Base Layer Top Blue
compfortable and good fit
high quality
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Helly Hansen Active Crew Undershirt Black Orange
Great Price great product!
HH quality :)
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Helly Hansen Active Crew Undershirt Black Red
Great Price great product!
HH quality :)
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Icebreaker 200 Oasis Long Sleeve Base Layer Top Dark Blue Women
Feel good factor
Excellent quality - a bit on the big side as a base layer - I bought a small and if it were available I'd have bought and XS so it's not a base layer it's an overlayer. Lovely though - I can't stop wearing it!
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