An extra layer can be essential if you're working in cold conditions. These thermal base layers are robust and designed to keep you warm by providing an additional layer of insulation.


32 products

The Portwest B026 Insulated Knit Hat combines high-visibility safety with thermal insulation, making it ideal for cold weather work environments. Featuring reflective yarns and Insulatex lining, it offers warmth, comfort, and enhanced visibility for outdoor professionals.

The B120 Thermal T-Shirt is a short-sleeve base layer designed to provide warmth and comfort in cold working conditions. Made from a durable polyester/cotton blend, it offers excellent thermal insulation while remaining breathable and lightweight. Ideal for layering under workwear.

Designed to deliver superior warmth and comfort in cold working environments. Made from a soft poly-cotton blend, these thermal base layer trousers feature an elasticated waistband and cuffed hems to retain heat and ensure a secure fit. Ideal for layering under workwear in cold conditions, without compromising mobility.

The Portwest B123 Thermal Long Sleeve T-Shirt is designed to deliver consistent warmth and breathable comfort in cold working conditions. Made from a durable blend of polyester and cotton, this thermal base layer is ideal for layering under workwear. Its round neck and long sleeve design offer full coverage, making it a reliable choice for outdoor and industrial environments.

Stay warm, dry, and protected with the Portwest B151 Base Pro Antibacterial Legging. Designed for high-performance work environments, this thermal base layer offers moisture-wicking comfort and odour control thanks to its silver ion treatment. Ideal for construction, outdoor work, and cold storage settings.

The Portwest B171 Dynamic Air Baselayer Legging is a close-fitting thermal layer designed to keep workers warm, dry, and comfortable. With silver ion treatment and stretch fabric, it’s perfect for high-exertion tasks in cold or variable climates.

The Portwest B173 DynamicAir Baselayer Top is a close-fitting, odour-resistant thermal layer designed for year-round use. Featuring Silver Ion technology and moisture-wicking fabric, it delivers comfort, durability, and freshness in any condition.

The Portwest CD885 Stretch Panel Work Jacket combines smart design with rugged durability. Featuring innovative stretch panelling and eco-friendly polycotton fabric, this jacket offers superior comfort and mobility for professionals in demanding work environments.

The Portwest CR15 Polo Shirt combines everyday comfort with advanced protection. Designed with cut-resistant sleeves rated to Level D, this long-sleeved polo is ideal for professionals working in high-risk environments where safety and mobility are essential.

The Portwest CS20 Fleece Balaclava is a lightweight thermal accessory designed to keep workers warm in cold environments. With a soft, stretchable fit and anti-pill fleece construction, it offers comfort and durability for daily use.

The Portwest CS21 Neck Tube is a lightweight thermal accessory designed to keep workers warm in cold environments. Made from soft anti-pill fleece and featuring an adjustable drawcord, it offers comfort, durability, and a secure fit.

The Portwest CS24 Cooling Multiway Scarf is a versatile workwear accessory designed for comfort and adaptability. Made from stretchable polyester elastane, it can be worn in multiple configurations while maintaining its shape and breathability.

Stay warm, visible, and mobile with the Portwest DX473 DX4 High Viz Baffle Jacket. Featuring body-mapped insulation, stretch-knit sleeves, and segmented reflective tape, this jacket is built for high-performance comfort and safety in demanding environments.

The Portwest EC10 Eco Hi-Vis S/S Polo offers sustainable safety with a modern fit. Made from 100% recycled polyester, it combines high visibility with eco-conscious design for professionals who care about performance and the planet.

The FR32 anti-static flame-resistant Henley is a long-sleeve protective work top designed for use in hazardous environments where heat, flame and static control are required. It offers a balance of certified protection, comfort and durability, making it suitable for industrial, electrical and energy sector applications.

The FR503 WX3 FR Coverall in Black is a flame‑resistant protective overall designed for use in high‑risk work environments. Its robust construction and comfort‑focused design deliver essential protection against heat, flame and static hazards while supporting freedom of movement and practical utility.

This lightweight flame‑resistant work jacket offers reliable protection and enhanced mobility for professionals operating in hazardous industrial and trade environments. Its stretch‑panel design supports ease of movement while providing thermal safety and breathability.

The FR701 WX3 flame-resistant hi‑visibility long-sleeve T-shirt provides essential protection for industrial and maintenance workers. Combining high visibility with flame, heat, and anti-static resistance, it is designed for comfort, mobility, and safety in hazardous environments.

The FR702 WX3 flame‑resistant hi‑visibility long sleeve polo shirt combines high visibility with protective performance for workers in hazardous environments. It is designed to offer thermal hazard resistance, visibility in low‑light conditions, and comfort for extended wear.

The FR703 flame‑resistant RIS sweatshirt is a high‑visibility protective top designed for industrial and utility workers. It combines flame resistance with reflective visibility so wearers can be seen in low‑light conditions while remaining safeguarded against heat and static hazards.

The FR704 fire retardant RIS hoodie in black is a protective high‑visibility garment designed to offer flame resistance while keeping workers comfortable. It combines safety performance with casual‑wear styling for use in industrial, maintenance, utility, and outdoor work settings.

Helmet Liner Cap is designed to fit tight to the head to give an extra layer of warmth without the bulk. Constructed from stretchy polyester elastane material, the HA18 is the perfect solution to fit under any helmet.

A versatile high-visibility pilot jacket that combines multi-mode wear with robust protection and practical features. It’s designed to adapt to changing weather and work conditions, offering three different configurations in one garment.

The Portwest PW352 PW3 Hi-Vis Winter Coverall is a premium all-in-one protective garment designed for extreme cold, wet and low-visibility conditions. Built with heavy insulation and practical features, this coverall keeps workers warm, dry and visible in harsh outdoor environments.

The Portwest PW369 PW3 Hi-Vis Winter Parka Jacket is a heavy-duty insulated coat designed to keep workers warm, dry and visible in extreme cold and wet conditions. Its rugged construction, thermal lining and reflective detailing make it suitable for outdoor work, construction, utilities and harsh weather environments.

The Hi-Vis Ultrasonic Heated Tunnel Jacket offers the best in high visibility standards and insulation properties. Carbon fibre heated panels are embedded into this padded jacket to bring extra warmth and comfort to the wearer. The use of innovative heat sealed baffle fabric increases its water resistance. This jacket also has three heat settings controlled by a button at the chest.

T701 - WX3 Work Trouser is a contemporary work trouser that fits as good as it looks. Made from durable poly-cotton canvas fabric and includes triple stitched seams, these trousers have been built to last. Innovative design features like stretch panelling provides excellent comfort and flexibility in key movement areas. Other practical features include high rise back waistband with side elastication, knee pad pockets offer extra protection in all working conditions and multiple pockets provide secure storage.

The T740 - WX3 Winter Jacket is a contemporary winter jacket gives excellent waterproof protection as well thermal insulation. Key features include reflective segmented trim, 2 way zip, adjustable zip off hood and plenty of pockets for storage.

Cutting edge softshell gilet that has a windproof, water-resistant and breathable membrane with the added luxury of a micro polar fleece. Clever features include Ezee zip technology, reflective trims and multiple pockets.

The WX3 Baffle Jacket incorporates an ergonomic body-mapped design to balance insulation and comfort. Padded Insulatex panels help keep the core body area warm, while the softshell panels provide a windproof and breathable membrane. Two zipped side entry chest pockets and internal pockets offer plenty of secure storage space.

T753 - WX3 Eco Hybrid Softshell Jacket is a cutting edge softshell jacket using sustainable fabrics that has a windproof, water-resistant, and breathable membrane with the added luxury of a micro polar fleece. Clever features include pre-formed elbows, reflective trims, and multiple pockets.

The Carla Soft Shell Jacket is perfect for ladies who need to look smart but still desire protection from adverse weather conditions. Made from a technical soft shell fabric, this tailored piece is water resistant and includes a storm flap, adjustable hood and zipped pockets.