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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99 products

  • 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
    £89.49
    Regular price
    £105.00
    Sale price
    £89.49
  • Icebreaker Mens Merino 200 Oasis Crewe Short Sleeve Thermal Top
    Black Coloured Icebreaker Mens Merino 200 Oasis Crewe Short Sleeve Thermal Top on white background Black Coloured Icebreaker Mens Merino 200 Oasis Crewe Short Sleeve Thermal Top on white background
    Icebreaker Mens Merino 200 Oasis Crewe Short Sleeve Thermal Top
    Regular price
    £57.95
    Regular price
    £75.00
    Sale price
    £57.95
  • Seeland Active Camo Long Sleeve T-Shirt
    InVis Green Coloured Seeland Active Camo Long Sleeve T-Shirt On A White Background InVis Green Coloured Seeland Active Camo Long Sleeve T-Shirt On A Forest Background
    Seeland Active Camo Long Sleeve T-Shirt
    Regular price
    £59.99
    Regular price
    £59.99
    Sale price
    £59.99
  • Harkila Base Warm Long Johns
    Willow Green/Shadow Brown coloured Harkila Base Warm Long Johns on white bachground Willow Green/Shadow Brown coloured Harkila Base Warm Long Johns on white bachground
    Harkila Base Warm Long Johns
    Regular price
    £109.99
    Regular price
    £109.99
    Sale price
    £109.99
  • 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 Harkila Base Active Long Johns on white background Dark Willow Green 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 Mountain Hunter Expedition T-Shirt
    AXIS Mountain coloured Harkila Mountain Hunter Expedition T-Shirt on white background AXIS Mountain coloured Harkila Mountain Hunter Expedition T-Shirt on mountain background
    Harkila Mountain Hunter Expedition T-Shirt
    Regular price
    £79.99
    Regular price
    £79.99
    Sale price
    £79.99
  • Harkila Moose Hunter 2.0 T-Shirt
    Mossy Oak Break-up Country coloured Harkila Moose Hunter 2.0 T-Shirt on white background Mossy Oak Break-up Country coloured Harkila Moose Hunter 2.0 T-Shirt on woodland background
    Harkila Moose Hunter 2.0 T-Shirt
    Regular price
    £79.99
    Regular price
    £79.99
    Sale price
    £79.99
  • Harkila Logmar Insulated Packable Knee Breeches
    Willow Green Coloured Harkila Logmar Insulated Packable Knee Breeches On A White Background Willow Green Coloured Harkila Logmar Insulated Packable Knee Breeches On A Wooden House Background
    Harkila Logmar Insulated Packable Knee Breeches
    Regular price
    £229.99
    Regular price
    £229.99
    Sale price
    £229.99
  • DeWalt Jonesborough Zip Through Mid Layer Fleece
    DeWalt Jonesborough Zip Through Mid Layer Fleece in Grey DeWalt Jonesborough Zip Through Mid Layer Fleece in Grey
    DeWalt Jonesborough Zip Through Mid Layer Fleece
    Regular price
    £29.95
    Regular price
    £34.99
    Sale price
    £29.95
  • Regatta Thermal Long Johns
    Regatta Thermal Long Johns in Denim Blue
    Regatta Thermal Long Johns
    Regular price
    £8.95
    Regular price
    Sale price
    £8.95
  • Jack Pyke Roll Neck Top
    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
    Regular price
    £15.95
    Regular price
    £18.95
    Sale price
    £15.95
  • TuffStuff Basewear Long Sleeve T-Shirt
    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
    Regular price
    £8.45
    Regular price
    £12.95
    Sale price
    £8.45
  • Fort Thermal Long Johns
    Blue coloured Fort Thermal Long Johns on white background Blue coloured Fort Thermal Long Johns on white background
    Fort Thermal Long Johns
    Regular price
    £5.45
    Regular price
    £7.95
    Sale price
    £5.45
  • 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
    £98.95
    Regular price
    £109.99
    Sale price
    £98.95
  • Deerhunter Heat Undershirt with Zip Neck
    Black coloured Deerhunter Heat Undershirt with Zip Neck on white background Black coloured Deerhunter Heat Undershirt with Zip Neck on woody background
    Deerhunter Heat Undershirt with Zip Neck
    Regular price
    £107.95
    Regular price
    £119.99
    Sale price
    £107.95
  • Deerhunter Norden Insulated Long Johns
    Brown Melange coloured Deerhunter Norden Insulated Long Johns on white background Brown Melange coloured Deerhunter Norden Insulated Long Johns on wooden background
    Deerhunter Norden Insulated Long Johns
    Regular price
    £35.95
    Regular price
    £39.99
    Sale price
    £35.95
  • Deerhunter Quinn Merino Undershirt
    Black Oak coloured Deerhunter Quinn Merino Undershirt on white background Black Oak coloured Deerhunter Quinn Merino Undershirt on forest background
    Deerhunter Quinn Merino Undershirt
    Regular price
    £98.95
    Regular price
    £109.99
    Sale price
    £98.95
  • Harkila All Season Long Johns
    Shadow Brown coloured Harkila All Season Long Johns on white background Shadow Brown coloured Harkila All Season Long Johns on white background
    Harkila All Season Long Johns
    Regular price
    £99.99
    Regular price
    £99.99
    Sale price
    £99.99
  • Hard Yakka Mens Cotton Trunk Five Pack
    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
    Regular price
    £19.95
    Regular price
    £25.99
    Sale price
    £19.95
  • 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
  • Icebreaker Mens Merino 260 Tech Half Zip Thermal Top
    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
    Regular price
    £99.50
    Regular price
    £125.00
    Sale price
    £99.50
  • 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
    £74.95
    Regular price
    £95.00
    Sale price
    £74.95
  • 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
  • Harkila Base Active Long Sleeve O-Neck
    Dark Willow Green coloured Harkila Base Active Long Sleeve O-Neck on white background Dark Willow Green coloured Harkila Base Active Long Sleeve O-Neck on forest background
    Harkila Base Active Long Sleeve O-Neck
    Regular price
    £89.99
    Regular price
    £89.99
    Sale price
    £89.99
  • Harkila Heat Long Johns
    Willow Green Black Harkila Heat Long Johns on white background Willow Green Black Harkila Heat Long Johns on white background
    Harkila Heat Long Johns
    Regular price
    £219.99
    Regular price
    £219.99
    Sale price
    £219.99
  • Caterpillar Thermo Comfort Pants
    Caterpillar Thermo Comfort Pants in Black
    Caterpillar Thermo Comfort Pants
    Regular price
    £13.50
    Regular price
    £19.99
    Sale price
    £13.50
  • Laksen Clisham Merino Long Johns
    Sand Coloured Laksen Clisham Long Johns On A White Background
    Laksen Clisham Merino Long Johns
    Regular price
    £99.00
    Regular price
    £99.00
    Sale price
    £99.00
  • Harkila All Season Long Johns Base Layer
    Harkila All Season Long Johns Base Layer in Shadow Brown Harkila All Season Long Johns Base Layer in Shadow Brown
    Harkila All Season Long Johns Base Layer
    Regular price
    £129.99
    Regular price
    £129.99
    Sale price
    £129.99
  • Harkila All Season Half Zip Base Layer
    Harkila All Season Half Zip Base Layer in Shadow Brown Harkila All Season Half Zip Base Layer in Shadow Brown
    Harkila All Season Half Zip Base Layer
    Regular price
    £129.99
    Regular price
    £129.99
    Sale price
    £129.99
  • Musto Mens Thermal Base Layer
    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
    Regular price
    £59.95
    Regular price
    £75.00
    Sale price
    £59.95
  • Laksen Clisham Short Sleeve T-Shirt
    Sand Coloured Laksen Clisham Short Sleeve T-Shirt On A White Background
    Laksen Clisham Short Sleeve T-Shirt
    Regular price
    £99.00
    Regular price
    £99.00
    Sale price
    £99.00
  • Laksen Clisham Long Sleeve T-Shirt
    Sand Coloured Laksen Clisham Long Sleeve V-neck T-Shirt On A White Background Sand Coloured Laksen Clisham Long Sleeve V-neck T-Shirt On A White Background
    Laksen Clisham Long Sleeve T-Shirt
    Regular price
    £109.00
    Regular price
    £109.00
    Sale price
    £109.00
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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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