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Men's Underwear

Browse our selection of high quality mens underwear. High Quality thermal insulated underwear suitable to be worn underneath your garments to keep you warm.
  • Hawker Base Layer
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    Available UK Sizes
    S , M , L , XL , XXL , 3XL
Seeland Hawker Base Layer
£74.99

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  • Climate Base Layer
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    Available UK Sizes
    S , M , L , XL , XXL , 3XL
Seeland Climate Base Layer
£109.99

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Seeland Ageo Base Layer
£58.49
RRP: £64.99
You Save: £6.50 (10%)

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Seeland 2 pack Boxer Briefs
£26.99
RRP: £29.99
You Save: £3.00 (10%)

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  • All Season Long Johns
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    Available Sizes
    M , L , XL , XXL , 3XL , 4XL
Harkila All Season Long Johns
£74.99

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  • All Season Shirt Zip-Neck
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    Available UK Sizes
    S , M , L , XL , XXL , 3XL
Harkila All Season Shirt Zip-Neck
£84.99

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  • Coldfront Long Johns
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    Available Sizes
    XL , 3XL , 4XL
Harkila Coldfront Long Johns
£99.99

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Mens Underwear

High quality, Men's underwear, available at Great British Outfitters' outstanding prices to suit your outdoor needs! Men's underwear comes from top brands such as Harkila and Seeland, who are famous for offering an amazing quality of clothing and accessories!