Collection: 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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113 products

  • Harkila Base Warm Zip Neck
    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
    Regular price
    £107.00
    Regular price
    £119.99
    Sale price
    £107.00
  • Swazi Long Sleeve Micro Top
    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
    Regular price
    £29.95
    Regular price
    £29.95
    Sale price
    £29.95
  • Deerhunter Heat Long Johns
    Black coloured Deerhunter Heat Long Johns on white background Black coloured Deerhunter Heat Long Johns on white background
    Deerhunter Heat Long Johns
    Regular price
    £93.12
    Regular price
    £109.99
    Sale price
    £93.12
  • Percussion Megadry Sweatshirt
    Khaki coloured Percussion Megadry Sweatshirt on white background Black coloured Percussion Megadry Sweatshirt on white background
    Percussion Megadry Sweatshirt
    Regular price
    £16.95
    Regular price
    £22.95
    Sale price
    £16.95
    Sale
  • Caterpillar Thermo Long Sleeve Shirt
    Caterpillar Thermo Long Sleeve Shirt in Black
    Caterpillar Thermo Long Sleeve Shirt
    Regular price
    £14.99
    Regular price
    £19.99
    Sale price
    £14.99
  • Elka Mens Thermal Trousers
    Olive Coloured Elka Mens Thermal Trousers on white background Olive Coloured Elka Mens Thermal Trousers on white background
    Elka Mens Thermal Trousers
    Regular price
    From £17.95
    Regular price
    £43.95
    Sale price
    From £17.95
  • TuffStuff Basewear Bottoms
    Black Coloured TuffStuff Basewear Bottoms On A White Background Black Coloured TuffStuff Basewear Bottoms On A Fitting Room Background
    TuffStuff Basewear Bottoms
    Regular price
    £7.95
    Regular price
    £9.95
    Sale price
    £7.95
  • Deerhunter Climate Half Zip Long Sleeve T-Shirt With 37.5 Technology
    Forest Ember coloured Deerhunter Climate Half Zip Long Sleeve T-Shirt with 37.5® Technology on white background Forest Ember coloured Deerhunter Climate Half Zip Long Sleeve T-Shirt with 37.5® Technology on white background
    Deerhunter Climate Half Zip Long Sleeve T-Shirt With 37.5 Technology
    Regular price
    £62.95
    Regular price
    £69.99
    Sale price
    £62.95
  • Musto Mens Thermal Base Layer Trouser
    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
    Regular price
    £55.95
    Regular price
    £70.00
    Sale price
    £55.95
  • Harkila Forest Hunter Long Sleeve T-Shirt
    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
    Regular price
    £53.95
    Regular price
    £59.99
    Sale price
    £53.95
  • Seeland Active Camo Long Sleeve T-Shirt
    InVis Green Coloured Seeland Active Camo Long Sleeve T-Shirt on white background InVis Green Coloured Seeland Active Camo Long Sleeve T-Shirt on forest background
    Seeland Active Camo Long Sleeve T-Shirt
    Regular price
    £53.95
    Regular price
    £59.99
    Sale price
    £53.95
  • Harkila Gorm Long Sleeve T-Shirt
    Willow Green Coloured Harkila Gorm Long Sleeve T-Shirt on white background Willow Green Coloured Harkila Gorm Long Sleeve T-Shirt on outdoor background
    Harkila Gorm Long Sleeve T-Shirt
    Regular price
    £49.99
    Regular price
    £49.99
    Sale price
    £49.99
  • Percussion Megadry Long Johns
    Khaki coloured Percussion Megadry Long Johns on white background Black coloured Percussion Megadry Long Johns on white background
    Percussion Megadry Long Johns
    Regular price
    £15.95
    Regular price
    £22.95
    Sale price
    £15.95
    Sale
  • Helly Hansen Lifa Base Layer Crewneck
    Helly Hansen Lifa Base Layer Crewneck in Black Helly Hansen Lifa Base Layer Crewneck in Black
    Helly Hansen Lifa Base Layer Crewneck
    Regular price
    £35.95
    Sale price
    £35.95
  • Regatta Professional Thermal Long Johns
    Regatta Thermal Long Johns in Denim Blue
    Regatta Professional Thermal Long Johns
    Regular price
    £8.95
    Regular price
    Sale price
    £8.95
  • Swazi Micro Fleece Singlet
    Black Coloured Swazi Micro Fleece Singlet On A White Background Black Coloured Swazi Micro Fleece Singlet On A Forest Background
    Swazi Micro Fleece Singlet
    Regular price
    £24.95
    Regular price
    £24.95
    Sale price
    £24.95
  • Icebreaker Merino 200 Flexi Chute
    Black Coloured Icebreaker Unisex Merino 200 Flexi Chute on white background Black Coloured Icebreaker Unisex Merino 200 Flexi Chute on white background
    Icebreaker Merino 200 Flexi Chute
    Regular price
    £22.25
    Regular price
    £27.00
    Sale price
    £22.25
    Add to cart
  • Hard Yakka Mens Heritage Icon Singlet
    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
    Regular price
    £15.95
    Regular price
    £17.99
    Sale price
    £15.95
  • Swanndri Mens Merino Fusion T-Shirt
    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
    Regular price
    £44.95
    Regular price
    £49.99
    Sale price
    £44.95
  • Seeland Mens Apex One Hundred Long Johns
    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
    Regular price
    £62.95
    Regular price
    £69.99
    Sale price
    £62.95
    New Arrival
  • Seeland Peak Half Zip Top
    Pine Green Melange Coloured Seeland Peak Half Zip on white background Pine Green Melange Coloured Seeland Peak Half Zip on outdoor background
    Seeland Peak Half Zip Top
    Regular price
    £44.95
    Regular price
    £49.99
    Sale price
    £44.95
    New Arrival
  • Deerhunter Quinn Merino Half Zip Undershirt
    Black Oak coloured Deerhunter Mens Quinn Merino Half Zip Undershirt on white background Black Oak coloured Deerhunter Mens Quinn Merino Half Zip Undershirt on white background
    Deerhunter Quinn Merino Half Zip Undershirt
    Regular price
    £94.95
    Regular price
    £119.99
    Sale price
    £94.95
    Sale
  • Line 7 Merino Leggings
    Midnight Coloured Line 7 Merino Leggings on white background Midnight Coloured Line 7 Merino Leggings on white background
    Line 7 Merino Leggings
    Regular price
    £54.99
    Regular price
    £54.99
    Sale price
    £54.99
  • Line 7 Mens Merino Long Sleeve Raglan T-Shirt Baselayer
    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
    Regular price
    £54.99
    Regular price
    £54.99
    Sale price
    £54.99
  • Icebreaker Mens Merino 260 Tech Thermal Leggings
    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
    Regular price
    £84.75
    Regular price
    £105.00
    Sale price
    £84.75
  • Icebreaker Mens Merino 200 Oasis Half Zip Thermal Top
    Black Coloured Icebreaker Mens Merino 200 Oasis Half Zip Thermal Top on white background Black Coloured Icebreaker Mens Merino 200 Oasis Half Zip Thermal Top on white background
    Icebreaker Mens Merino 200 Oasis Half Zip Thermal Top
    Regular price
    £72.50
    Regular price
    £95.00
    Sale price
    £72.50
  • Harkila Base Mesh Long Johns
    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
    Regular price
    £109.99
    Regular price
    £109.99
    Sale price
    £109.99
  • Harkila Base All Season Side Zip Long Johns
    Shadow Brown Harkila Base All Season Side Zip Long Johns on white background Shadow Brown Harkila Base All Season Side Zip Long Johns on Blurry background
    Harkila Base All Season Side Zip Long Johns
    Regular price
    £129.99
    Regular price
    £129.99
    Sale price
    £129.99
  • Harkila Base Active Long Johns
    Dark Willow Green Coloured Harkila Base Active Long Johns on white background Dark Willow Green Coloured Harkila Base Active Long Johns on white background
    Harkila Base Active Long Johns
    Regular price
    £84.99
    Regular price
    £84.99
    Sale price
    £84.99
  • Harkila Heat Long Johns
    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
    Regular price
    £197.00
    Regular price
    £219.99
    Sale price
    £197.00
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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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