Thermal base layers

Thermal base layers are a starting point for a work outfit you can adjust as conditions change. Compare the fabric composition, neckline, sleeve length and care instructions rather than relying on a warmth label alone. Check whether the intended fit is close or relaxed using the style-specific size chart.

Consider how the layer sits beneath your work trousers, overalls or jacket. Seams and excess fabric can feel different during a long seated task or repeated bending. If your work requires flame-resistant or other specialist clothing, follow the workplace specification for the full clothing system.

See coveralls and overalls and work jackets when planning the layers around it.