Men's Base Layer / Underwear

Stay warm all winter with our collection of mens baselayers and thermals, including long johns, and versatile short or long sleeve tops. Choose from a wide range of sizes, styles, and materials such as merino wool.
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119 products

  • Grey Fog coloured Helly Hansen Mens Tech Crew Long Sleeve T-Shirt 2.0 on white background Grey Fog coloured Helly Hansen Mens Tech Crew Long Sleeve T-Shirt 2.0 on white background
    +1
    Helly Hansen Mens Tech Crew Long Sleeve T-Shirt 2.0
    £24.95
    £30.00
    £24.95

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  • White Coloured Helly Hansen Mens Lifa Stripe Long Sleeve Crew Base Layer on white background White Coloured Helly Hansen Mens Lifa Stripe Long Sleeve Crew Base Layer on white background
    Helly Hansen Mens Lifa Stripe Long Sleeve Crew Base Layer
    £29.95
    £40.00
    £29.95

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    Ski Free
  • Soft Grey Marl coloured Craghoppers Mens Nosilife Abel Long Sleeved T-Shirt on white background Soft Grey Marl coloured Craghoppers Mens Nosilife Abel Long Sleeved T-Shirt on white background
    Craghoppers Mens Nosilife Abel Long Sleeved T-Shirt
    £27.00
    £45.00
    £27.00

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    Sale
  • EVO coloured Quick Wick Armour Top on white background EVO coloured Quick Wick Armour Top on forest background
    Jack Pyke Quick Wick Armour Top
    £14.95
    £18.95
    £14.95

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  • Black Coloured Icebreaker Mens Merino 260 Tech Crewe Thermal Top on white background Black Coloured Icebreaker Mens Merino 260 Tech Crewe Thermal Top on white background
    +2
    Icebreaker Mens Merino 260 Tech Crew Thermal Top
    £79.95
    £105.00
    £79.95
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    Sale
  • Green Coloured Hoggs of Fife 100% Merino Wool Short Sleeve Crew Neck Base Layer on white background Green Coloured Hoggs of Fife 100% Merino Wool Short Sleeve Crew Neck Base Layer on white background
    Hoggs of Fife 100% Merino Wool Short Sleeve Crew Neck Base Layer
    £29.95
    £39.95
    £29.95

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    Sale
  • Dark Iron coloured Craghoppers Mens NosiLife Nour Long Sleeved T-Shirt on white background Dark Iron coloured Craghoppers Mens NosiLife Nour Long Sleeved T-Shirt on mountain background
    Craghoppers Mens NosiLife Nour Long Sleeved T-Shirt
    £19.95
    £40.00
    £19.95
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    New Arrival
  • Navy coloured Regatta Professional Mens 65/35 Long Sleeves Polo Top on white background Navy coloured Regatta Professional Mens 65/35 Long Sleeves Polo Top on outdoor background
    Regatta Professional Mens 65/35 Polo Shirt
    £9.95
    £20.00
    £9.95
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  • Navy Coloured Helly Hansen Mens Lifa Merino Midweight Half-Zip Base Layer on white background Navy Coloured Helly Hansen Mens Lifa Merino Midweight Half-Zip Base Layer on white background
    Helly Hansen Mens Lifa Merino Midweight Half-Zip Base Layer
    £69.95
    £100.00
    £69.95
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    SaleSki Free
  • Black Coloured Icebreaker Mens Merino 200 Oasis Crewe Thermal Top on white background Black Coloured Icebreaker Mens Merino 200 Oasis Crewe Thermal Top on mountain background
    +3
    Icebreaker Mens Merino 200 Oasis Crew Thermal Top
    From £64.95
    £85.00
    From £64.95
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    Sale
  • Shadow Brown Coloured Harkila Base All Season Short Sleeve T-Shirt on white background Shadow Brown Coloured Harkila Base All Season Short Sleeve T-Shirt on outdoor background
    Harkila Base All Season Short Sleeve T-Shirt
    £59.99
    £59.99
    £59.99
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  • Gritstone Heather Coloured Icebreaker Mens Merino 200 Oasis Crew Short Sleeve Thermal Top on white background Gritstone Heather Coloured Icebreaker Mens Merino 200 Oasis Crew Short Sleeve Thermal Top on white background
    Icebreaker Mens Merino 200 Oasis Crew Short Sleeve Thermal Top
    £59.50
    £75.00
    £59.50
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  • Forest Green coloured Deerhunter Chamois Short Sleeve T-Shirt on white background Forest Green coloured Deerhunter Chamois Short Sleeve T-Shirt on forest background
    Deerhunter Chamois Short Sleeve T-Shirt
    £18.95
    £29.99
    £18.95
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    Sale
  • Midnight Coloured Line 7 Merino Leggings on white background Midnight Coloured Line 7 Merino Leggings on white background
    Line 7 Merino Leggings
    £54.99
    £54.99
    £54.99
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  • Midnight Silver Coloured Line 7 Mens Merino Long Sleeve Raglan T-Shirt Baselayer on white background Midnight Silver Coloured Line 7 Mens Merino Long Sleeve Raglan T-Shirt Baselayer on white background
    Line 7 Mens Merino Long Sleeve Raglan T-Shirt Baselayer
    £54.99
    £54.99
    £54.99
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  • HJ Hall 3 Pack Pure Cotton Fly-Front Briefs in Navy HJ Hall 3 Pack Pure Cotton Fly-Front Briefs in Navy
    HJ Hall 3 Pack Pure Cotton Fly-Front Briefs
    £18.95
    £30.00
    £18.95
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    Sale
  • Black Coloured Icebreaker 200 Oasis Glove Liners on white background Black Coloured Icebreaker 200 Oasis Glove Liners on white background
    Icebreaker 200 Oasis Glove Liners
    £24.95
    £33.00
    £24.95
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    Sale
  • Green Coloured Hoggs of Fife 100% Merino Wool Long Sleeve Crew Neck Base Layer on white background Green Coloured Hoggs of Fife 100% Merino Wool Long Sleeve Crew Neck Base Layer on lake background
    Hoggs of Fife 100% Merino Wool Long Sleeve Crew Neck Base Layer
    £40.95
    £44.95
    £40.95

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  • Green Coloured Hoggs of Fife 100% Merino Wool Long Pants on white background Green Coloured Hoggs of Fife 100% Merino Wool Long Pants on white background
    Hoggs of Fife 100% Merino Wool Long Pants
    £40.45
    £44.95
    £40.45

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  • Navy Coloured Helly Hansen Mens Lifa Active Crew Base Layer on white background Navy Coloured Helly Hansen Mens Lifa Active Crew Base Layer on white background
    Helly Hansen Mens Lifa Active Crew Base Layer
    £37.95
    £55.00
    £37.95
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    Ski Free
  • Dark Olive coloured Jack Pyke Mens Half Zip Sweatshirt on white background Dark Olive coloured Jack Pyke Mens Half Zip Sweatshirt on white background
    Jack Pyke Mens Half Zip Sweatshirt
    £33.50
    £37.50
    £33.50
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  • Navy Coloured Helly Hansen Mens Lifa Active Base Layer Pants on white background Navy Coloured Helly Hansen Mens Lifa Active Base Layer Pants on white background
    Helly Hansen Mens Lifa Active Base Layer Pants
    £34.95
    £50.00
    £34.95
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    Ski Free
  • Green coloured Jack Pyke Mens Cotton T-Shirt on white background Green coloured Jack Pyke Mens Cotton T-Shirt on white background
    Jack Pyke Mens Cotton T-Shirt
    £15.95
    £17.95
    £15.95
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    New Arrival
  • Black Coloured Swazi Micro Fleece Singlet On A White Background Black Coloured Swazi Micro Fleece Singlet On A Forest Background
    Swazi Micro Fleece Singlet
    £24.95
    £24.95
    £24.95
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  • Navy Coloured Helly Hansen Mens Lifa Active Solen Base Layer on white background Navy Coloured Helly Hansen Mens Lifa Active Solen Base Layer on white background
    Helly Hansen Mens Lifa Active Solen Base Layer
    £43.95
    £60.00
    £43.95
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    Ski Free
  • Black Coloured Icebreaker Merino 200 Oasis Balaclava on white background Black Coloured Icebreaker Merino 200 Oasis Balaclava on white background
    Icebreaker Merino 200 Oasis Balaclava
    £23.95
    £27.00
    £23.95
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  • Green coloured Jack Pyke Mens Base Layer Set on white background Green coloured Jack Pyke Mens Base Layer Set on white background
    Jack Pyke Mens Base Layer Set
    £23.95
    £27.95
    £23.95

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  • Black Coloured Icebreaker Merino 200 Flexi Chute on white background Black Coloured Icebreaker Merino 200 Flexi Chute on white background
    Icebreaker Merino 200 Flexi Chute
    £22.25
    £27.00
    £22.25
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  • Olive Coloured Elka Mens Thermal Trousers on white background Olive Coloured Elka Mens Thermal Trousers on white background
    Elka Mens Thermal Trousers
    From £17.95
    £43.95
    From £17.95
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  • Black coloured Percussion Megadry Sweatshirt on white background Khaki coloured Percussion Megadry Sweatshirt on white background
    Percussion Megadry Sweatshirt
    £16.95
    £20.00
    £16.95

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    Sale
  • Navy coloured Hard Yakka Mens Heritage Icon Singlet on white background Navy coloured Hard Yakka Mens Heritage Icon Singlet on outdoor background
    Hard Yakka Mens Heritage Icon Singlet
    £15.95
    £17.99
    £15.95
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  • EVO coloured Jack Pyke Roll Neck Top Evo on white background EVO coloured Jack Pyke Roll Neck Top Evo on white background
    Jack Pyke Roll Neck Top
    £15.95
    £18.95
    £15.95

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  • Black Coloured Viper Mesh-Tech Armour Top on white background Black Coloured Viper Mesh-Tech Armour Top on white background
    +2
    Viper Mesh-Tech Armour Top
    £14.95
    £17.95
    £14.95

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  • Black Yellow Charcoal Coloured Caterpillar Boxer Shorts Twin Pack on White Backgroud
    Caterpillar Boxer Shorts Twin Pack
    £11.00
    £14.99
    £11.00
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  • HJ Hall 2 Pack Cotton Stetch Trunks in White HJ Hall 2 Pack Cotton Stetch Trunks in Black
    HJ Hall 2 Pack Cotton Stretch Trunks
    £14.99
    £25.00
    £14.99
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    Sale
  • Parchment coloured Craghoppers Mens NosiLife SolarShield+ Half Zip Top on white background Parchment coloured Craghoppers Mens NosiLife SolarShield+ Half Zip Top on mountain background
    Craghoppers Mens NosiLife SolarShield+ Half Zip Top
    £37.50
    £60.00
    £37.50
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    New Arrival
  • Brown coloured Northern Hunting Mens Vidar Baselayer Pants on white background Brown coloured Northern Hunting Mens Vidar Baselayer Pants on white background
    Northern Hunting Mens Vidar Baselayer Pants
    £45.00
    £45.00
    £45.00
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  • Dark Green coloured Northern Hunting Norr Vik Long Sleeve Baselayer Top on white background Dark Green coloured Northern Hunting Norr Vik Long Sleeve Baselayer Top on forest background
    Northern Hunting Norr Vik Long Sleeve Baselayer Top
    £59.00
    £59.00
    £59.00
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  • Dark Green coloured Northern Hunting Norr Fal Baselayer Pants on white background Dark Green coloured Northern Hunting Norr Fal Baselayer Pants on forest background
    Northern Hunting Norr Fal Baselayer Pants
    £59.00
    £59.00
    £59.00
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  • Pine Green Coloured Seeland Mens Apex One Hundred Long Johns on white background Pine Green Coloured Seeland Mens Apex One Hundred Long Johns on outdoor background
    Seeland Mens Apex One Hundred Long Johns
    £62.95
    £69.99
    £62.95
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Men's base layers, also known as thermals or thermal underwear, are essential garments for braving the harshest climates during outdoor activities.

These base layers are designed to provide warmth and comfort by trapping body heat close to the skin. Whether you're working out on the farm in the early winter mornings or heading for a hike through the snow, these mens thermals are a must-have item.

Stocking top brands like Fort and Deerhunter, this collection holds a wide range of options, from long-sleeved tops to long johns and merino wool base layers. Each garment is made from high-quality materials with excellent moisture-wicking properties to keep you dry and regulate your body temperature, preventing you from feeling too hot or too cold.

Layering can make all the difference when it comes to effective performance, and these base layers for men are the ideal starting point. Stay warm, stay comfortable, and enjoy the great outdoors to the fullest!

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