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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84 products

  • 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
    £49.99
    Regular price
    £59.99
    Sale price
    £49.99
  • Deerhunter Quinn Merino Undershirt
    Deerhunter Quinn Merino Undershirt in Black Oak Deerhunter Quinn Merino Undershirt in Black Oak
    Deerhunter Quinn Merino Undershirt
    Regular price
    £98.95
    Regular price
    £109.99
    Sale price
    £98.95
  • 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 Mesh Crew Neck
    Shadow Brown Harkila Base Mesh Crew Neck on white background Shadow Brown Harkila Base Mesh Crew Neck on door background
    Harkila Base Mesh Crew Neck
    Regular price
    £119.99
    Regular price
    £119.99
    Sale price
    £119.99
  • 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 Deer Stalker Camo Long Sleeve T-Shirt
    Axis Forest coloured Harkila Deer Stalker Camo Long Sleeve T-Shirt on white background Axis Forest coloured Harkila Deer Stalker Camo Long Sleeve T-Shirt on white background
    Harkila Deer Stalker Camo Long Sleeve T-Shirt
    Regular price
    £89.99
    Regular price
    £89.99
    Sale price
    £89.99
  • 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
  • Jack Pyke Roll Neck Top Evo
    Jack Pyke Roll Neck Top in Evo Jack Pyke Roll Neck Top in Digicam
    Jack Pyke Roll Neck Top Evo
    Regular price
    £15.95
    Regular price
    £18.95
    Sale price
    £15.95
  • Caterpillar Thermo Comfort Pants
    Caterpillar Thermo Comfort Pants in Black
    Caterpillar Thermo Comfort Pants
    Regular price
    £13.50
    Regular price
    £17.99
    Sale price
    £13.50
  • Deerhunter Norden Insulated Long Johns
    Deerhunter Norden Insulated Long Johns in Brown Melange Deerhunter Norden Insulated Long Johns in Brown Melange
    Deerhunter Norden Insulated Long Johns
    Regular price
    £35.95
    Regular price
    £39.99
    Sale price
    £35.95
  • 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
  • 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
  • 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
  • Seeland Active Long Sleeve T-Shirt
    Pine Green Coloured Seeland Active Long Sleeve T-Shirt On A White Background Pine Green Coloured Seeland Active Long Sleeve T-Shirt On A White Background
    Seeland Active Long Sleeve T-Shirt
    Regular price
    £44.95
    Regular price
    £49.99
    Sale price
    £44.95
  • 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 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
  • 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
    £109.95
    Regular price
    £125.00
    Sale price
    £109.95
  • 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 Sleeve T-Shirt
    Willow Green Black Harkila Heat Long Sleeve T-Shirt on white background Willow Green Black Harkila Heat Long Sleeve T-Shirt on white background
    Harkila Heat Long Sleeve T-Shirt
    Regular price
    £219.99
    Regular price
    £219.99
    Sale price
    £219.99
  • 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
    £59.95
    Regular price
    £70.00
    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 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
  • 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
  • Ariat Mens Lowell 1/4 Zip Base Layer
    Ariat Mens Lowell 1/4 Zip Base Layer in Black Ariat Mens Lowell 1/4 Zip Base Layer in Black
    Ariat Mens Lowell 1/4 Zip Base Layer
    Regular price
    From £28.99
    Regular price
    £60.00
    Sale price
    From £28.99
    Clearance
  • 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
    £79.99
    Regular price
    £95.00
    Sale price
    £79.99
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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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