Description
The Portwest B173 Dynamic Air Baselayer thermal underwear is a functional base layer for anyone working outdoors or in unheated spaces in cold conditions. The material combines polyamide, polypropylene and elastane for a stretchy, skin-friendly fit. The fabric actively wicks away moisture and keeps the skin dry during physical work.
For what type of work is the B173 thermal underwear suitable?
The B173 is suitable for outdoor work and other situations where you are exposed to the cold or moving for extended periods, such as in construction, logistics, landscaping or agriculture.
The base layer works best as the first layer under workwear. Thanks to the moisture-wicking properties of the polypropylene, the skin stays dry, even during physical exertion. This prevents cooling from sweat and makes the layer suitable for both active and stationary work in cold conditions.
What does EN 14058 class 1 mean for this thermal underwear?
EN 14058 is the European standard for garments that provide protection against cold environments. Class 1 is the entry-level class and indicates that the garment provides a limited but measurable thermal insulation value, in this case 0.102 m².K/W, which corresponds to a Clo value of 0.7.
This makes the B173 suitable as a base layer in mildly cold conditions, but not as the only protection in extreme cold. Combine this underwear with a warmer mid- or outer layer when the temperature drops significantly or the working conditions are more demanding.
The garment weighs 245 g/m² and contains 5% elastane for freedom of movement. Wash at a maximum of 40°C, do not tumble dry.
Material and care:
- Outer material: 65% Polyamide, 28% Polypropylene, 5% Elastane, 2% Polyester (245 g/m²)
Washing instructions: Max wash temp 40°C, mild process. Do not bleach. Do not tumble dry. Do not iron. Do not dry clean.