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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110 products

  • 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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    Sale
  • 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
    £90.00
    £69.95
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    SaleSki Free
  • 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 work space background
    Helly Hansen Mens Lifa Stripe Long Sleeve Crew Base Layer
    From £29.95
    £40.00
    From £29.95

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    Ski 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
  • 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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  • Loden Coloured Icebreaker Mens Merino 200 Oasis Thermal Leggings on white background Loden Coloured Icebreaker Mens Merino 200 Oasis Thermal Leggings on white background
    Icebreaker Mens Merino 200 Oasis Thermal Leggings
    £67.90
    £85.00
    £67.90
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  • Willow Green Shadow Brown Coloured Harkila Base Warm Zip Neck on white background Willow Green Shadow Brown Coloured Harkila Base Warm Zip Neck on countryside background
    Harkila Base Warm Zip Neck
    £119.99
    £119.99
    £119.99
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  • 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
    £35.95
    £39.95
    £35.95

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  • Shadow Brown Coloured Harkila Base Mesh Long Johns on white background Shadow Brown Coloured Harkila Base Mesh Long Johns on white background
    Harkila Base Mesh Long Johns
    £109.99
    £109.99
    £109.99
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  • Washed Navy Coloured Helly Hansen Mens Lifa Merino Midweight Logo Base Layer on white background Washed Navy Coloured Helly Hansen Mens Lifa Merino Midweight Logo Base Layer on white background
    Helly Hansen Mens Lifa Merino Midweight Logo Base Layer
    £69.95
    £90.00
    £69.95
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    Ski Free
  • Black Coloured Helly Hansen Mens Lifa Lightweight Base Layer Pants on white background Black Coloured Helly Hansen Mens Lifa Lightweight Base Layer Pants on white background
    Helly Hansen Mens Lifa Lightweight Base Layer Pants
    £29.95
    £40.00
    £29.95
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    Ski Free
  • Woodland Green coloured Craghoppers Mens Nosilife Abel Long Sleeved T-Shirt on white background Woodland Green coloured Craghoppers Mens Nosilife Abel Long Sleeved T-Shirt on white background
    +3
    Craghoppers Mens Nosilife Abel Long Sleeved T-Shirt
    From £15.95
    £45.00
    From £15.95

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    Sale
  • Willow Green Black Coloured Harkila Heat Long Johns on white background Willow Green Black Coloured Harkila Heat Long Johns on white background
    Harkila Heat Long Johns
    £219.99
    £219.99
    £219.99
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  • Willow Green Black Coloured Harkila Heat Long Sleeve T-Shirt on white background Willow Green Black Coloured Harkila Heat Long Sleeve T-Shirt on white background
    Harkila Heat Long Sleeve T-Shirt
    £219.99
    £219.99
    £219.99
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    Sale
  • Black Coloured Helly Hansen Mens Lifa Merino Midweight 2-In-1 Base Layer Pants on white background Navy Coloured Helly Hansen Mens Lifa Merino Midweight 2-In-1 Base Layer Pants on white background
    Helly Hansen Mens Lifa Merino Midweight Base Layer Pants
    £59.95
    £80.00
    £59.95
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    Ski Free
  • Black Coloured Icebreaker Mens Merino 260 Tech Thermal Leggings on white background Black Coloured Icebreaker Mens Merino 260 Tech Thermal Leggings on white background
    Icebreaker Mens Merino 260 Tech Thermal Leggings
    £84.75
    £105.00
    £84.75
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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
  • Shadow Brown Coloured Harkila All Season Half Zip Base Layer on white background Shadow Brown Coloured Harkila All Season Half Zip Base Layer on mountain background
    Harkila All Season Half Zip Base Layer
    £129.99
    £129.99
    £129.99
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  • 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
  • Denim Coloured Fort Thermal Long Sleeve Vest On A White Background White Coloured Fort Thermal Long Sleeve Vest On A White Background
    Fort Thermal Long Sleeve Vest
    £5.35
    £7.95
    £5.35

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  • Shadow Brown Coloured Harkila Base Mesh Crew Neck on white background Shadow Brown Coloured Harkila Base Mesh Crew Neck on house background
    Harkila Base Mesh Crew Neck
    £99.99
    £119.99
    £99.99

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    Sale
  • Black Coloured Swazi Long Sleeve Micro Top on white background Black Coloured Swazi Long Sleeve Micro Top on white background
    Swazi Long Sleeve Micro Top
    £29.95
    £29.95
    £29.95
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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 Icebreaker 260 Tech Glove Liners on white background Black Coloured Icebreaker 260 Tech Glove Liners on white background
    Icebreaker 260 Tech Glove Liners
    £27.95
    £35.00
    £27.95
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  • Black coloured HJ Hall Mens Cotton Rich Thermal Long Sleeve Top on white background Black coloured HJ Hall Mens Cotton Rich Thermal Long Sleeve Top on white background
    HJ Hall Mens Cotton Rich Thermal Long Sleeve Top
    £15.95
    £30.00
    £15.95
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    Sale
  • Willow Green Coloured Harkila Base All Season Long Sleeve T-Shirt On A White Background Willow Green Coloured Harkila Base All Season Long Sleeve T-Shirt On A Backyard Background
    Harkila Base All Season Long Sleeve T-Shirt
    £74.99
    £74.99
    £74.99

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  • Black Coloured Elka Mens Crew Neck Thermal Base Layer on white background Black Coloured Elka Mens Crew Neck Thermal Base Layer on outdoor background
    Elka Mens Crew Neck Thermal Base Layer
    From £15.95
    £22.35
    From £15.95
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    Sale
  • Dark Grey Marl coloured Musto Mens Thermal Base Layer Trouser on white background Dark Grey Marl coloured Musto Mens Thermal Base Layer Trouser on white background
    Musto Mens Thermal Base Layer Trouser
    £55.95
    £70.00
    £55.95
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  • Black Coloured Icebreaker Mens Merino 200 Oasis 3/4 Thermal Leggings on white background Black Coloured Icebreaker Mens Merino 200 Oasis 3/4 Thermal Leggings on white background
    Icebreaker Mens Merino 200 Oasis 3/4 Thermal Leggings
    £61.46
    £75.00
    £61.46
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  • Hunting Green Shadow Brown Coloured Harkila Forest Hunter Long Sleeve T-Shirt on white background Hunting Green Shadow Brown Coloured Harkila Forest Hunter Long Sleeve T-Shirt on white background
    Harkila Forest Hunter Long Sleeve T-Shirt
    £59.99
    £59.99
    £59.99
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  • Navy coloured Helly Hansen Mens Tech Crew Long Sleeve T-Shirt 2.0 on white background Navy 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
    From £24.95
    £30.00
    From £24.95

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  • Black Coloured Swanndri Mens Merino Fusion T-Shirt on white background Black Coloured Swanndri Mens Merino Fusion T-Shirt on white background
    Swanndri Mens Merino Fusion T-Shirt
    £44.95
    £49.99
    £44.95
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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
    £45.00
    £34.95
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    Ski Free
  • Black Coloured TuffStuff Basewear Long Sleeve T-Shirt On A White Background Black Coloured TuffStuff Basewear Long Sleeve T-Shirt On A Fitting Room Background
    TuffStuff Basewear Long Sleeve T-Shirt
    £8.45
    £12.95
    £8.45
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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 TuffStuff Basewear Bottoms On A White Background Black Coloured TuffStuff Basewear Bottoms On A Fitting Room Background
    TuffStuff Basewear Bottoms
    £7.95
    £9.95
    £7.95

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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 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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  • 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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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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