The Portwest S645 is a men’s long sleeve base layer with built-in heating for cold working days. Low-profile carbon fibre heating elements sit at the front and back of the abdomen, spreading warmth evenly across the core.
A three-level control button lets you raise or lower the heat as conditions or activity change. The soft, brushed-back knitted fabric adds thermal insulation of its own, and flat lock seams keep it comfortable worn next to the skin under your other layers.
Key features
- Battery-powered carbon fibre heated panels at front and back abdomen give consistent warmth to the core
- Three-level heat control button lets you adjust the temperature to suit the conditions
- Rechargeable battery pack included, with up to 4 hours of battery life
- Micro USB charging cable included
- Knitted fabric with a brushed backing provides insulation and thermal protection
- Anti-bacterial finish helps stop odour and bacteria growth during long shifts
- Flat lock seams reduce rubbing against the skin
Materials and performance
Shell: 100% polyester, knitted with a brushed back, 150g. Lining: 100% polyester, knitted with a brushed back, 150g.
Standards and protection
This heated base layer complies with RoHS and the EMC Directive 2014/30/EU.
Fit and sizing
Regular fit. See our Portwest Sizing Guide for detailed information.
Power and charging
The top comes with its own rechargeable battery pack and a micro USB charging cable. A full charge gives up to 4 hours of battery life, and you choose the heat level with the three-level control button.
Care
- Machine wash at 40°C
- Do not bleach
- Do not tumble dry
- Drip dry in the shade
- Do not iron
- Do not dry clean
Add your logo
If you’d like to add your logo to the Portwest S645 Heated Base Layer Top Long Sleeve, please contact us.
























