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Underwear

Our selection of work underwear and base layers is designed for professionals who face demanding conditions and long hours on the job. These garments provide essential warmth, moisture management, and all-day comfort, and many can be customised with embroidery or print to support your branded uniform requirements.

Ideal for industries such as construction, transport, warehousing, and security, our thermal underwear includes long-sleeved tops, leggings, and briefs from trusted brands like Portwest, Regatta, and Fristads. These base layers feature soft-touch materials, stretch-fit fabrics, and flat seams for added comfort and mobility.  Some styles are also EN Certified Flame Retardant, Anti-Static or Arc Flash protective clothing

Looking to outfit your team? Our in-house embroidery and print services let you add logos or team names to suitable garments — especially thermal tops that may be worn as visible outer layers in some work environments. It’s a great way to stay professional, warm, and on-brand, even in the coldest conditions.

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  • Portwest B120 Thermal T-Shirt S/SPortwest B120 Thermal T-Shirt S/S

    Portwest B120 Thermal T-Shirt S/S

    A traditional t-shirt cut that offers optimum warmth at all times. The material construction allows the skin to breathe if conditions become too warm. The round neck makes it ideal for wearing as an under-garmentThe PWB120 features: Provides insulation and thermal protection Designed with...
    £7.50
    £7.50
    • Black
    • Navy
    2 Days
    in stock
  • Portwest B121 Thermal TrousersPortwest B121 Thermal Trousers

    Portwest B121 Thermal Trousers

    The B121 creates a layer of warmth around the lower body. The soft poly-cotton fibres and fabric knitting mean that heat is trapped in. Cuffed hem and elasticated waist provide a comfortable fit.The PWB121 features: Provides insulation and thermal protection Designed with a comfort...
    £7.85
    £7.85
    • Black
    • Grey
    • Navy
    • White
    2 Days
    in stock
  • Portwest B123 Thermal T-Shirt L/SlvPortwest B123 Thermal T-Shirt L/Slv

    Portwest B123 Thermal T-Shirt L/Slv

    A long sleeve t-shirt cut that offers optimum warmth at all times. The material construction allows the skin to breathe if conditions become too warm. The round neck makes it ideal for wearing as an under-garmentThe PWB123 features: Provides insulation and thermal protection Designed...
    £8.65
    £8.65
    • Black
    • Grey
    • Navy
    • White
    2 Days
    in stock
  • Portwest B133 Base Layer Thermal TopPortwest B133 Base Layer Thermal Top

    Portwest B133 Base Layer Thermal Top

    Crew neck styling, low profile seam construction and cuffed sleeves ensure an excellent fit.The PWB133 features: Provides insulation and thermal protection Breathable, high-wicking, moisture management Designed with a comfort fit Excellent moisture wicking properties Available in sizes up to 4XL Retail box which aids...
    £10.55
    £10.55
    • Black
    • Charcoal
    2 Days
    in stock
  • Fort 803 Thermal Long JohnsFort 803 Thermal Long Johns

    Fort 803 Thermal Long Johns

    When a blast of Arctic air hits the country, you'll be glad you left home in your Thermal Long Johns. Made from brushed polycotton, they feel soft to the touch and warm in the bitterest weather. With elasticated waist and a front opening, they're...
    £5.95
    £5.95
    • Denim
    • White
    4 Days
    in stock
  • Beeswift CARC22 Arc Compliant Long SleeveBeeswift CARC22 Arc Compliant Long Sleeve

    Beeswift CARC22 Arc Compliant Long Sleeve

    Flame Retardant, Anti-Static, ARC Long sleeved T- Shirt (under garment). 210gsm 60/40 Modacrylic/ cotton with anti static. Inherently flame retardant fabric. FR properties will not diminish with repeated laundering, Soft comfortable fabric with contrast FR sewing thread EN ISO 13688: 2013 EN 1149-3: 2008...
    £32.35
    £32.35
    • Navy
    3 Days
    in stock
  • Kariban KB800 BoxersKariban KB800 Boxers

    Kariban KB800 Boxers

    Boxers. Elasticated waistband with contrast piping.. 160 gsm. 95% cotton/5% elastane.
    £4.85
    £4.85
    • Black
    • White
    2 Days
    in stock
  • Fort 801 Thermal Long Sleeve VestFort 801 Thermal Long Sleeve Vest

    Fort 801 Thermal Long Sleeve Vest

    Winters are a lot more enjoyable when you're wearing a warming base layer. Our brushed polycotton Thermal Long-Sleeve Vest is soft and cosy. It's ideal for farmers, fishermen, country sports enthusiasts, security personnel, and anyone who has to be outdoors for long periods. Sold...
    £5.95
    £5.95
    • Denim
    • White
    4 Days
    in stock
  • Portwest FR14 Flame-Resistant Anti-Static Leggings

    Portwest FR14 Flame-Resistant Anti-Static Leggings

    Designed for cooler conditions to keep the wearer warm, comfortable and safe. Elasticated waistband allows freedom of movement and the ribbed hem cuffs help trap in heat.The PWFR14 features: Inherent flame resistant qualities will not diminish with washing Protection against radiant, convective and contact...
    £32.75
    £32.75
    • Navy
    2 Days
    in stock
  • Asquith & Fox AQ094 Men's classic boxersAsquith & Fox AQ094 Men's classic boxers

    Asquith & Fox AQ094 Men's classic boxers

    The Asquith & Fox AQ094 Men's classic boxers features: Loose cotton boxer for men with false fly detail. Self-fabric gathered elasticated waist for user comfort. Washing Instructions Domestic wash at 40c. The Asquith Fox men's classic boxers, made from 100% cotton are a staple...
    £5.35
    £5.35
    • Black
    • White
    2 Days
    in stock
  • Portwest DX480 Zip Base LayerPortwest DX480 Zip Base Layer

    Portwest DX480 Zip Base Layer

    The DX4 Zip Base Layer Top is lightweight and breathable which assists with perfect body temperature control. The high stretch, highly durable nylon fabric complements the body mapped design. Offering raglan sleeves for fluid movement and comfort. The full front zip with chin guard...
    £45.90
    £45.90
    • Black
    • Metro Blue
    2 Days
    in stock
  • Beeswift CARC24 Arc Compliant Long JohnBeeswift CARC24 Arc Compliant Long John

    Beeswift CARC24 Arc Compliant Long John

    Flame Retardant, Anti-Static, ARC Long Johns (under garment). 210gsm 60/40 Modacrylic/ cotton with anti static. Inherently flame retardant fabric. FR properties will not diminish with repeated laundering, Soft comfortable fabric with contrast FR sewing thread EN ISO 13688: 2013 EN 1149-3: 2008 EN 1149-5:...
    £28.40
    £28.40
    • Navy
    3 Days
    in stock
  • Portwest B126 Women's Thermal T-Shirt Long Sleeve

    Portwest B126 Women's Thermal T-Shirt Long Sleeve

    The PWB126 features: Women's fit Provides insulation and thermal protection Designed with a comfort fit Round neck and long sleeves Main Fabric: 50% Polyester, 50% Cotton - 200g/m2
    £7.70
    £7.70
    • Black
    2 Days
    in stock
  • Portwest B171 Dynamic Air Baselayer Legging

    Portwest B171 Dynamic Air Baselayer Legging

    The PWB171 features: Wicking, cooling and drying capabilities Seamless body mapped panelling for breathability and comfort Provides insulation and thermal protection Fast drying Contrast colour stitching for added style Designed with a comfort fit Breathable, high-wicking, moisture management Retail box which aids presentation for...
    £12.95
    £12.95
    • Charcoal
    2 Days
    in stock
  • Portwest B125 Women's Thermal Trousers

    Portwest B125 Women's Thermal Trousers

    The PWB125 features: Provides insulation and thermal protection Ribbed hem for a comfortable fit Designed with a comfort fit Main Fabric: 50% Polyester, 50% Cotton - 200g/m2
    £6.85
    £6.85
    • Black
    2 Days
    in stock
  • Fort 802 Thermal Short Sleeve VestFort 802 Thermal Short Sleeve Vest

    Fort 802 Thermal Short Sleeve Vest

    This is the warm and cosy base layer for outdoors enthusiasts who like a bit more freedom of movement in their arms. Our Thermal Short-Sleeve Vest is made from the same air-trapping brushed polycotton. The only difference is in the length of the sleeves....
    £4.75
    £4.75
    • Denim
    • White
    4 Days
    in stock
  • Portwest DX481 Hi-Vis Base LayerPortwest DX481 Hi-Vis Base Layer

    Portwest DX481 Hi-Vis Base Layer

    The DX4 Hi-Vis Base Layer is lightweight and breathable which assists with perfect body temperature control. The high stretch, highly durable nylon fabric complements the body-mapped design. Offering raglan sleeves and HiVis Tex Pro segmented tape for fluid movement and extra comfort. The PWDX481...
    £56.15
    £56.15
    • Orange / Black
    • Yellow / Black
    2 Days
    in stock
  • Portwest B153 Base Pro Antibacterial Top

    Portwest B153 Base Pro Antibacterial Top

    The Base Pro top incorporates Silver Ion treatment which combats odour and increases longevity. The top is close fitting for optimal wicking performance and suitable for multi-season use.The PWB153 features: Provides insulation and thermal protection Unique anti-bacterial silver ion treatment Breathable, high-wicking, moisture management...
    £13.30
    £13.30
    • Black
    2 Days
    in stock
  • Portwest B151 Base Pro Antibacterial Legging

    Portwest B151 Base Pro Antibacterial Legging

    This legging offers enhanced thermal protection, wicks moisture away from the body and combats odour, keeping the wearer cool, dry and comfortable under exerting conditions.The PWB151 features: Provides insulation and thermal protection Unique anti-bacterial silver ion treatment Breathable, high-wicking, moisture management Contrast colour stitching...
    £13.30
    £13.30
    • Black
    2 Days
    in stock
  • Portwest B184 Merino Wool 1/4 Zip Baselayer Top

    Portwest B184 Merino Wool 1/4 Zip Baselayer Top

    The PWB184 features: 1/4 length centre front zip for added comfort and versatility Provides insulation and thermal protection Designed with a comfort fit Mulesling free Flat lock seams for extra comfort Naturally moisture wicking and breathable Lightweight for enhanced wearer comfort Anti-odour Highly durable...
    £45.55
    £45.55
    • Black
    2 Days
    in stock