The Portwest B133 Thermal Baselayer Top is a men’s insulating layer for work in cold conditions. It sits next to the skin, holding in warmth while drawing moisture away from the body.
The 140g wicking polyester is breathable and manages sweat during active work. A Texpel™ fabric finish helps it dry faster and makes stains easier to remove. Low-profile seams and cuffed sleeves let it sit neatly beneath your other layers.
Key features
- High-wicking polyester draws sweat away from the skin to help keep you dry
- Breathable fabric releases moisture during physical work
- Thermal insulation helps retain body heat in cold conditions
- Texpel™ wicking finish speeds up drying and aids stain removal
- Low-profile seam construction lies flat beneath outer layers
- Cuffed sleeves help keep warmth in at the wrists
- Crew neck sits comfortably under shirts, fleeces and jackets
Materials and performance
100% wicking polyester, 140g.
Fit and sizing
Regular fit. See our Portwest Sizing Guide for detailed information.
Layering
Wear it next to the skin as your first layer. Add a fleece or midlayer and an outer jacket on top for colder days, or wear it under a work shirt for extra warmth.
Care
- Machine wash at 40°C on a gentle cycle
- Do not bleach
- Do not iron
- Do not dry clean
Add your logo
If you’d like to add your logo to the Portwest B133 Thermal Baselayer Top, please contact us.





















