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Workwear Thermals Built for Cold Days on Site
A good thermal base layer is the first step to staying warm when you’re working outdoors. Worn close to the skin, thermal underwear traps heat and moves sweat away from your body, so you stay warm and dry under your work trousers and jacket. Our workwear thermals are designed to fit under your everyday kit without adding bulk.
Budget Thermal Underwear
For great value, our Portwest and Beeswift thermals do the job without the price tag:
- Portwest B123 long sleeve thermal top: available in sizes XS to 5XL.
- Portwest B121 long johns: the matching bottoms.
- Portwest B120: a short sleeve thermal tee.
- Beeswift THVLS lightweight thermal vest and THLJ long johns: a popular choice for layering.
- Portwest Base Pro B151 long johns: if you want extra freshness on long shifts, they’re antibacterial.
Merino Wool Thermals
Merino wool is naturally warm, breathable and comfortable against the skin, making it one of the best materials for thermal underwear. We stock merino base layers from:
- Helly Hansen: the Lifa Merino half zip top.
- Snickers: the 9480 merino top and 9481 bottoms.
- Blåkläder: merino thermal leggings and long johns, including the 100% merino Xwarm 1845 and Cosy 1849.
Find out more in our Helly Hansen base layer review.
Thermal Pants & Long Johns
Our thermal pants and long johns come in lightweight styles for layering and warmer options for the coldest days:
- Lightweight Portwest B131 wicking long johns
- Helly Hansen Lifa Pant
- Snickers Fusion 9486 thermal bottoms
For a full range, browse our thermal long johns.
Specialist Base Layers
For high-energy work, Snickers seamless and Stay Fresh base layers are designed to keep you comfortable as you move. If your job needs flame-retardant protection, the Portwest FR14 flame retardant, antistatic leggings can be worn under your flame-retardant workwear.
Thermal Work Socks
Don’t forget your feet. The Portwest SK18 Extreme Cold Weather socks are made with 40% wool to keep your feet warm and dry. We also stock Portwest SK11 thermal socks and Snickers merino wool work socks to wear with your safety boots.
Need Help Choosing?
Not sure which thermals are right for your job? Read our guide to picking the perfect thermal clothing, call our team on 0113 256 7021, or visit our showroom in Pudsey, Leeds.