Portwest Thermal Trousers B121
Cold mornings and chilly sites are part of the job, so a reliable base layer makes a real difference. These Portwest thermal trousers create a layer of warmth around the lower body and keep heat close to the skin. The 50% polyester and 50% cotton blend, with a weight of 200 g/m², forms a soft knitted construction that traps warmth. Moisture transport helps keep the wearer dry and comfortable during long shifts. The elastic waist and ribbed knit cuffs at the ankles provide a snug, comfortable fit that sits neatly under work pants or technical clothing. A front fly and a long leg length add practical detail. Available in sizes up to 5XL, these long work pants suit a wide range of tasks in cold conditions.
Key Features
- Warmth retained by a soft knitted construction
- Moisture transport keeps the wearer dry
- Elastic waist for a comfortable fit
- Long leg length for full coverage
Product Features
- Material - 50% polyester / 50% cotton
- Weight - 200 g/m²
- Waistband - Elastic
- Leg length - Long
- Closure - Front fly
- Cuffs - Ribbed knit at the ankles
- Article number - B121
Standards and Safety
- Tested for cool conditions to EN14058 Class 2
- Thermal resistance of 0.137 m²K/W for warmth
- Clo value of 0.9 for insulation
Recommendations from our Unishore Expert
Wearing a thermal base layer is the smartest first step when temperatures drop. Pull these trousers on directly against the skin, then add your work pants on top, and the warmth stays where you need it. Choose the right size so there is room for layering and free movement, which keeps you comfortable while bending, climbing or kneeling on site. The knit construction also draws moisture away from the body during active tasks. Designed to offer protection to strict safety standards, these trousers are a sensible choice for anyone who works outdoors through the colder months.