Description
The Portwest B121 thermal trousers are an insulating base layer worn under work trousers or other outerwear. The model is designed for anyone working outdoors or in cold environments in low temperatures, such as in construction, logistics, or industry. The trousers maintain body temperature without restricting freedom of movement.
For what type of work are the Portwest B121 thermal trousers suitable?
The B121 is suitable for work where you are exposed to cold for extended periods, such as outdoor work in construction, warehouse work in refrigerated spaces, or industrial work during the winter months.
The trousers meet EN 14058 class 2, which means they provide a measurable thermal resistance of 0.137 m².K/W (Clo value 0.9). This is a certified insulation level suitable for moderate to cold working conditions. The B121 functions as a base layer and is therefore always worn under outdoor trousers.
What does EN 14058 class 2 mean for the Portwest B121 thermal trousers, and when should you choose this model?
EN 14058 is the European standard for garments that provide protection against cold environments. Class 2 represents a higher thermal resistance than class 1, meaning that the trousers provide more insulation during prolonged exposure to low temperatures.
You should choose the B121 when a lightweight base layer is insufficient and you need extra warmth without wearing heavy trousers. The polycotton material, made of 50% polyester and 50% cotton (200 g/m²), combines insulation with comfort, ensuring that the trousers remain comfortable even during prolonged use.
The B121 can be washed at a maximum of 40°C and ironed at a maximum of 150°C, making maintenance easy.
Material and care:
- Outer material: 50% Polyester, 50% Cotton (200 g/m²)
Washing instructions: Max wash temp 40°C, mild process. Do not bleach. Do not tumble dry. Line dry. Iron at max 150°C. Do not dry clean.