The Portwest B173 Dynamic Air Baselayer Top is a thermal first layer for work in cool conditions. Its fabric draws moisture away from the skin and dries quickly, which helps keep you dry and comfortable through changing levels of activity.
It adds insulation beneath your work clothing and suits use across more than one season. Seamless body-mapped panelling and contrast stitching give it a clean, modern finish.
Key features
- Moisture-wicking fabric draws sweat away from the skin to help keep you cool and dry
- Breathable construction lets body heat and moisture escape during active work
- Fast-drying fabric helps you stay comfortable after exertion or between tasks
- Insulating fabric provides thermal protection as a base layer
- Seamless body-mapped panelling supports breathability and reduces seams against the skin
- Stretch from the elastane content helps the top move with you
- Contrast stitching for a modern look
Materials and performance
71% polyamide, 26% polypropylene and 3% elastane, 245g.
Standards and protection
Certified to EN 14058 Class 1 for protection in cool environments, with a thermal resistance of 0.102 M².K/W (Clo: 0.7).
Fit and sizing
Regular fit. See our Portwest Sizing Guide for detailed information.
Layering
Wear it next to the skin as your first layer, with a midlayer and outer jacket on top. The wicking fabric moves moisture outwards so the layers above can do their job of keeping you warm.
Care
- Machine wash at 40°C on a gentle cycle
- Do not bleach
- Do not tumble dry
- Do not iron
- Do not dry clean
Add your logo
If you’d like to add your logo to the Portwest B173 Dynamic Air Baselayer Top, please contact us.























