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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114 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
    From £35.95
    £44.95
    From £35.95
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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
    £39.95
    £44.95
    £39.95
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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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  • Black Coloured Icebreaker Mens Merino 200 Oasis Crewe Thermal Top on white background Black Coloured Icebreaker Mens Merino 200 Oasis Crewe Thermal Top on white background
    +3
    Icebreaker Mens Merino 200 Oasis Crew Thermal Top
    From £64.95
    £85.00
    From £64.95
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    Sale
  • Black coloured Deerhunter Heat Undershirt with Zip Neck on white background Black coloured Deerhunter Heat Undershirt with Zip Neck on white background
    Deerhunter Heat Undershirt with Zip Neck
    £89.95
    £119.99
    £89.95
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    Sale
  • Light Bark Marl Coloured Ridgeline Baseline Pull On Zip Top on white background Light Bark Marl Coloured Ridgeline Baseline Pull On Zip Top on outdoor background
    Ridgeline Baseline Pull On Zip Top
    £27.95
    £34.99
    £27.95
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  • Navy Coloured Helly Hansen Mens Lifa Stripe Long-Sleeve Crew Base Layer on white background Navy 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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  • 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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    Sale
  • Black Coloured Icebreaker Mens Merino 200 Oasis Thermal Leggings on white background Black 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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  • Blue Stone coloured Craghoppers Mens Nosilife Abel Long Sleeved T-Shirt on white background Blue Stone coloured Craghoppers Mens Nosilife Abel Long Sleeved T-Shirt on white background
    +1
    Craghoppers Mens Nosilife Abel Long Sleeved T-Shirt
    £25.95
    £45.00
    £25.95
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    Sale
  • 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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  • Smokey Olive Marl Coloured Ridgeline Baseline Top on white background Smokey Olive Marl Coloured Ridgeline Baseline Top on outdoor background
    Ridgeline Baseline Top
    £24.95
    £29.99
    £24.95
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  • 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 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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  • 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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  • Black Coloured Icebreaker Unisex 260 Tech Gloves Liner on white background Black Coloured Icebreaker Unisex 260 Tech Gloves Liner 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 T-shirt on white background Black coloured HJ Hall Mens Cotton Rich Thermal T-shirt on white background
    HJ Hall Mens Cotton Rich Thermal T-shirt
    £12.95
    £24.00
    £12.95
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    Sale
  • Black Coloured Icebreaker Unisex 200 Oasis Glove Liners on white background Black Coloured Icebreaker Unisex 200 Oasis Glove Liners on white background
    Icebreaker 200 Oasis Glove Liners
    £24.95
    £33.00
    £24.95
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    Sale
  • Black Coloured Icebreaker Mens Merino 260 Tech Half Zip Thermal Top on white background Black Coloured Icebreaker Mens Merino 260 Tech Half Zip Thermal Top on white background
    Icebreaker Mens Merino 260 Tech Half Zip Thermal Top
    £99.50
    £125.00
    £99.50
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  • Black coloured Icebreaker Mens Merino 200 Oasis Mid Calf Thermal Leggings on white background Black coloured Icebreaker Mens Merino 200 Oasis Mid Calf Thermal Leggings on white background
    Icebreaker Mens Merino 200 Oasis 3/4 Thermal Leggings
    £61.46
    £75.00
    £61.46
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  • Black Coloured Elka Mens Thermal Base Layer Under Trousers on white background
    Elka Mens Thermal Base Layer Under Trousers
    From £17.99
    £44.90
    From £17.99
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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
    £179.99
    £219.99
    £179.99
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    Sale
  • Willow Green Shadow Brown Coloured Harkila Base Warm Long Johns on white background Willow Green Shadow Brown Coloured Harkila Base Warm Long Johns on white background
    Harkila Base Warm Long Johns
    £89.99
    £109.99
    £89.99
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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
    Helly Hansen Mens Tech Crew Long Sleeve T-Shirt 2.0
    £24.95
    £30.00
    £24.95
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  • Navy Coloured Helly Hansen Mens Lifa Merino Midweight Crew Base Layer on white background Black Coloured Helly Hansen Mens Lifa Merino Midweight Crew Base Layer on white background
    Helly Hansen Mens Lifa Merino Midweight Crew Base Layer
    From £49.95
    £85.00
    From £49.95
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  • 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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  • Dark Grey Marl coloured Musto Mens Thermal Base Layer Long-Sleeve Top on white background Dark Grey Marl coloured Musto Mens Thermal Base Layer Long-Sleeve Top on white background
    Musto Mens Thermal Base Layer
    £57.95
    £75.00
    £57.95
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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
    From £79.95
    £105.00
    From £79.95
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    Sale
  • 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 £19.54
    £22.35
    From £19.54
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  • Multi Coloured Hard Yakka Mens Cotton Trunk Five Pack on White Background Multi Coloured Hard Yakka Mens Cotton Trunk Five Pack on White Background
    Hard Yakka Mens Cotton Trunk Five Pack
    £19.95
    £25.99
    £19.95
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  • Denim Blue coloured Regatta Mens Thermal Long Sleeve Vest on white background Denim Blue coloured Regatta Mens Thermal Long Sleeve Vest on white background
    Regatta Professional Mens Thermal Long Sleeve Vest
    £8.45
    £25.00
    £8.45
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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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    New Arrival
  • 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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  • Blue coloured Fort Thermal Long Johns on white background Blue coloured Fort Thermal Long Johns on white background
    Fort Thermal Long Johns
    £4.95
    £7.95
    £4.95
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  • 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 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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  • Brown Melange coloured Deerhunter Norden Fleece Jacket on white background Brown Melange coloured Deerhunter Norden Fleece Jacket on forest background
    Deerhunter Norden Fleece Jacket
    £24.95
    £69.99
    £24.95
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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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  • 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
    £50.00
    £37.95
    View product
  • Black Coloured Helly Hansen Mens Lifa Active Stripe Crew Base Layer on white background Black Coloured Helly Hansen Mens Lifa Active Stripe Crew Base Layer on white background
    Helly Hansen Mens Lifa Active Stripe Crew Base Layer
    £35.95
    £50.00
    £35.95
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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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