Thermals

Our workwear thermals are engineered to keep your team comfortable, dry, and warm in challenging low-temperature environments. Each product in this category meets ISO 9920 standards for thermal resistance and is rated for wear in conditions as cold as -15°C, helping to prevent heat loss during long hours outdoors or in unheated industrial spaces.

Thermal tops and leggings offer a snug fit that traps warmth close to the skin, while still allowing free movement. Moisture-wicking technology helps regulate body temperature and prevents the discomfort of sweat build-up in cold weather. Elasticated cuffs, stretch fabrics, and lightweight layers mean you can wear these items under standard workwear without restricting motion or creating bulk.

Our thermals are built for demanding environments where warmth, flexibility, and reliability matter day after day: 

• Certified to ISO 9920 thermal insulation standards
• Rated for use in environments down to -15°C
• Lightweight and breathable base layers
• Moisture-wicking materials to reduce chill from perspiration
• Flexible, form-fitting designs for all-day wear
• Ideal for construction, logistics, transport, and rail sectors
• Fast UK delivery and easy online ordering

Thermals are a critical layer of protection when working in cold, damp, or exposed environments. Our range helps reduce fatigue, maintain performance, and meet safety expectations on site. For a full cold-weather uniform, explore our fleeces, bodywarmers, hoodies, or coveralls.

If you need help choosing the right thermal layer or understanding certifications, contact our team for advice.

What is ISO 9920 certification?
ISO 9920 is the international standard for evaluating the thermal insulation and water vapour resistance of clothing. Thermals with this certification are tested for performance in extreme cold and provide a reliable benchmark for PPE use.

Are these thermals suitable for outdoor site work?
Yes. All thermals in this range are designed for harsh environments, including outdoor construction, rail maintenance, and roadwork, especially in winter or early morning shifts.

Can these be worn under standard workwear?
Absolutely. The form-fitting design makes them ideal as base layers beneath jackets, overalls, or hi-vis clothing, without adding unnecessary bulk.

Do they provide moisture management as well as warmth?
Yes. Many garments in this range use moisture-wicking fabric to draw sweat away from the skin, helping you stay warm and dry, not damp and cold.

What temperature are these thermals rated for?
They are tested for performance down to -15°C, making them suitable for extended use in freezing or sub-zero conditions.