If the body is to remain at a constant temperature level, we must be able to regulate it.� The most effective way to achieve this is by a system called layering.
Layering allows us to regulate, or adjust our body temperature according to the degree, of physical activity undertaken.
By layering our clothing, we can trap the natural heat generated by our body, or we can ventilate air around it, in order to cool down.� By simply adding, removing or adjusting our clothing, we can warm up, or cool down according to the physical activity that is being pursued.
Essentially, there are 3 main layers:
INNER / BASE LAYER:
MID LAYER:
Also known as the warmth layer, this acts as an insulator, by trapping the heat radiated from the body.� (Refer to Fleece section)
OUTER LAYER:
Sometimes referred to as the �shell�, protects the wearer from external elements, i.e. wind and rain. (Refer to Waterproofs section).
- This type of garment wicks moisture away from the skin, as its primary function is to keep the surface of the skin dry.
- Wicking is the transference of moisture through capilliary action (one of the materials used). This layer is worn next to the skin, and ideally should be of a fabric with stretch properties � this will aid the wicking process.
- The seams of base layer products are normally on the outside for comfort.
- Synthetic fibres, such as polypropelene, polyester and viscose make ideal materials for base layer garments, as they encourage wicking and aid thermal insulation.
- Cotton is comfortable when worn next to the skin, however once cotton becomes wet (due to perspiration), it will remain damp for a log period of time � thus causing major discomfort.� Once cotton becomes wet, it has no insulation properties, and can quicken the chilling effect.
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