Icebreaker Base Layers & Thermal Underwear

(78)
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    15%
    Icebreaker
    Women's 300 MerinoFine Polar Leggings Merino base layer
    £159.95 £135.96
    5,0 (1)
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    to 24%
    Icebreaker
    Women's Siren L/S Sweetheart Merino base layer
    £69.95 from £53.16
    4,8 (70)
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    15%
    Icebreaker
    Women's 200 Oasis L/S Scoop Merino base layer
    £84.95 £72.21
    5,0 (5)
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    to 24%
    Icebreaker
    Women's 260 Tech L/S Crewe Merino base layer
    £104.95 from £79.76
    4,8 (25)
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    to 24%
    Icebreaker
    Women's Merino 260 Tech High Rise Leggings Merino base layer
    £109.95 from £83.56
    5,0 (2)
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    24%
    Icebreaker
    Women's Siren Thong Merino underpants
    £34.95 £26.56
    4,8 (24)
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    15%
    Icebreaker
    200 Oasis Legless Long john
    £74.95 £63.71
    5,0 (2)
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    15%
    Icebreaker
    Women's 200 Oasis Shorts Merino base layer
    £54.95 £46.71
    4,8 (15)
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    to 24%
    Icebreaker
    Women's 200 Oasis L/S Crewe Merino base layer
    £84.95 from £64.56
    4,8 (63)
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    30%
    Icebreaker
    Women's Merinoino Core Bra Graphite Merino base layer
    £32.95 £23.07
    4,7 (6)
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    24%
    Icebreaker
    Anatomica Tank Merino base layer
    £54.95 £41.76
    4,7 (24)
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    24%
    Icebreaker
    Women's Siren Tank Merino base layer
    £54.95 £41.76
    4,9 (166)
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    24%
    Icebreaker
    Women's 125 Cool-Lite Sprite Racerback Bra Sports bra
    £44.95 £34.16
    4,5 (10)
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    24%
    Icebreaker
    Women's 260 Tech L/S Half Zip Merino base layer
    £124.95 £94.96
    5,0 (3)
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    24%
    Icebreaker
    Women's Zoneknit 200 Leggings Merino base layer
    £114.95 £87.36
    5,0 (1)
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    24%
    Icebreaker
    Women's Siren Cami Merino base layer
    £49.95 £37.96
    4,7 (42)
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    to 24%
    Icebreaker
    200 Oasis L/S Crewe Merino base layer
    £84.95 from £64.56
    4,7 (53)
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    24%
    Icebreaker
    260 Tech L/S Half Zip Merino base layer
    £124.95 £94.96
    5,0 (1)
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    24%
    Icebreaker
    Women's 125 Cool-Lite Sprite Hipster Merino base layer
    £34.95 £26.56
    4,8 (10)
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    24%
    Icebreaker
    Women's Siren Bikini Merino underpants
    £34.95 £26.56
    4,5 (33)
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    24%
    Icebreaker
    260 Tech Leggings Long john
    £104.95 £79.76
    4,6 (5)
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    24%
    Icebreaker
    260 Tech L/S Crewe Merino base layer
    £104.95 £79.76
    5,0 (17)
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    24%
    Icebreaker
    Anatomica Boxers Merino base layer
    £39.95 £30.36
    4,8 (133)
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    24%
    Icebreaker
    Women's Siren Hipkini Merino base layer
    £34.95 £26.56
    4,9 (50)
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    24%
    Icebreaker
    Anatomica Briefs Merino base layer
    £34.95 £26.56
    4,5 (35)
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    25%
    Icebreaker
    Merino 125 Cool-Lite Sphere III S/S CB Merino shirt
    £74.95 £56.21
    5,0 (1)
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    24%
    Icebreaker
    Women's Siren Bra Cami Merino shirt
    £64.95 £49.36
    4,5 (16)
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    24%
    Icebreaker
    Anatomica S/S V Merino base layer
    £59.95 £45.56
    4,8 (18)
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    24%
    Icebreaker
    Anatomica S/S Crewe Merino base layer
    £59.95 £45.56
    4,8 (66)
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    24%
    Icebreaker
    Women's Merino 200 Oasis L/S Crewe Flock Forms Merino base layer
    £94.95 £72.16
    5,0 (1)
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    24%
    Icebreaker
    200 Oasis L/S Half Zip Merino base layer
    £94.95 £72.16
    5,0 (11)
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    24%
    Icebreaker
    Women's Merino 200 Oasis L/S Crewe Rainer Ridge Merino base layer
    £94.95 £72.16
    5,0 (1)
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    24%
    Icebreaker
    Women's 200 Oasis L/S V Merino base layer
    £84.95 £64.56
    4,9 (8)
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    24%
    Icebreaker
    Women's Merino Seamless Active Bra Sports bra
    £84.95 £64.56
    4,5 (2)
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    24%
    Icebreaker
    200 Oasis Leggings Long john
    £84.95 £64.56
    4,8 (25)
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    24%
    Icebreaker
    Women's Siren S/S Sweetheart Merino base layer
    £59.95 £45.56
    4,9 (36)
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    24%
    Icebreaker
    Women's 200 Oasis Leggings Merino base layer
    £84.95 £64.56
    4,7 (29)
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    24%
    Icebreaker
    200 Oasis S/S Crewe Merino base layer
    £74.95 £56.96
    5,0 (14)
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    24%
    Icebreaker
    Kids 260 Tech Leggings Merino base layer
    £49.95 £37.96
    5,0 (6)
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    24%
    Icebreaker
    200 Oasis Shorts Merino base layer
    £54.95 £41.76
    5,0 (2)
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    24%
    Icebreaker
    Women's 200 Oasis Legless Merino base layer
    £74.95 £56.96
    4,9 (7)
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    24%
    Icebreaker
    Kids 260 Tech L/S Half Zip Merino base layer
    £54.95 £41.76
    5,0 (6)
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    to 25%
    Icebreaker
    Kids 200 Oasis L/S Crewe Merino base layer
    £39.95 from £29.96
    4,8 (50)
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    24%
    Icebreaker
    Kids 200 Oasis Leggings Merino base layer
    £39.95 £30.36
    4,5 (21)
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    24%
    Icebreaker
    Women's 200 Oasis Boy Shorts Merino base layer
    £44.95 £34.16
    4,7 (10)
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    24%
    Icebreaker
    Women's Merino Rib Lotus Bra Sports bra
    £54.95 £41.76
    3,5 (2)
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    24%
    Icebreaker
    Anatomica Long Boxers Merino base layer
    £44.95 £34.16
    4,3 (6)
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    24%
    Icebreaker
    Women's Siren Bra Sports bra
    £44.95 £34.16
    4,2 (74)
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    24%
    Icebreaker
    260 Tech L/S Turtleneck Merino base layer
    £114.95 £87.36
    4,0 (1)
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    24%
    Icebreaker
    Merino 125 Cool-Lite Anatomica Trunks Merino base layer
    £34.95 £26.56
    4,0 (7)
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    24%
    Icebreaker
    Women's 125 Zoneknit Racerback Bra Sports bra
    £69.95 £53.16
    3,7 (3)
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    24%
    Icebreaker
    Women's Merino Queens Clasp Bra Sports bra
    £54.95 £41.76
    3,0 (1)
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    15%
    Icebreaker
    Women's 300 MerinoFine Polar L/S Half Zip Merino base layer
    £194.95 £165.71
    2,0 (1)
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    15%
    Icebreaker
    Merino 260 Zoneknit L/S Half Zip Merino base layer
    £134.95 £114.71
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    15%
    Icebreaker
    Women's Merino 260 Tech Vertex Hi Rise Leggings Leggings
    £114.95 £97.71
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    Icebreaker
    Women's Merino 150 Siren Hipkini Ski Day Merino base layer
    £34.95 £29.71
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    Icebreaker
    Women's Merino 260 Tech Vertex Hi-Rise Leggings Merino base layer
    £114.95 £97.71
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    15%
    Icebreaker
    Women's Merino 200 Oasis High Rise Leggings Merino base layer
    £89.95 £76.46
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    30%
    Icebreaker
    Women's Merino Rib Lotus Tank Tank top
    £59.95 £41.97
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    24%
    Icebreaker
    Merino Blend 260 Zoneknit SL 18 3/4 Tights Merino base layer
    £114.95 £87.36
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    24%
    Icebreaker
    Merino 200 Oasis+ L/S Half Zip Hoodie Merino base layer
    £114.95 £87.36
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    24%
    Icebreaker
    Women's Merino 260 Tech Vertex L/S Half Zip AOP Merino base layer
    £134.95 £102.56
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    24%
    Icebreaker
    Merino 200 Zoneknit L/S Half Zip Merino base layer
    £124.95 £94.96
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    24%
    Icebreaker
    Merino 125 Zoneknit Boxers Merino base layer
    £44.95 £34.16
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    24%
    Icebreaker
    Women's Merino 260 Zoneknit L/S Crewe Merino base layer
    £124.95 £94.96
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    24%
    Icebreaker
    Women's Zoneknit 260 Leggings Merino base layer
    £124.95 £94.96
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    24%
    Icebreaker
    Merino 260 Zoneknit 3/4 Leggings Merino base layer
    £114.95 £87.36
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    24%
    Icebreaker
    Women's Merino 200 Zoneknit L/S Crewe Merino base layer
    £114.95 £87.36
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    24%
    Icebreaker
    Women's 200 Merinofine Ace L/S Mock Neck Merino base layer
    £184.95 £140.56
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    24%
    Icebreaker
    Women's Merino 260 Zoneknit Seamless L/S Crewe Merino base layer
    £139.95 £106.36
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    24%
    Icebreaker
    Women's Merino 200 Oasis+ Suit Merino base layer
    £219.95 £167.16
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    24%
    Icebreaker
    200 Merinofine Ace L/S Half Zip Merino base layer
    £184.95 £140.56
    (0)
  • Check out our Buyers Guide!
    Looking for functional underwear? Check out our Buyers Guide!

Face any challenge with baselayer and underwear by Icebreaker

Icebreaker Functional Underwear

The right underwear is the most important piece of mountaineering equipment. Underwear by Icebreaker is perfectly suitable as the bottom layer of the onion principle. Baselayer and underwear by Icebreaker is light, very thin, perfectly breathable, and has a high thermal performance. And what's best: The material for Icebreaker underwear is 100% natural.

Icebreaker is based in New Zealand and was founded in 1995. The company's business concept was to put an alternative to synthetic outdoor clothing on the market. And they did it by using the wool of merino sheep! Icebreaker's high quality outdoor clothing doesn't only comprise baselayer and underwear, but also Icebreaker Merino for every layer of the onion principle.

What makes Icebreaker underwear so different?

Underwear by Icebreaker is so popular among outdoor enthusiasts because of the merino wool miracle fiber. Merino sheep live in mountain regions and are perfectly adapted to the weather conditions. Their wool proves this assumption. Its particularly fine fiber allows the manufacturer to produce an extremely thin fabric. Therefore, Icebreaker underwear is enormously comfortable and fits your body like a second skin. Even after long and intensive use, underwear by Icebreaker never feels uncomfortable. Merino fiber keeps your body warm, absorbs sweat without feeling wet, and dries quickly. The fabric immediately wicks moisture outwards where it can evaporate. Moreover, fabric made of merino wool is very light.
A material with so many outstanding characteristics is exactly the right ingredient for Icebreaker underwear. Another great aspect of merino wool is that it barely takes on odours. This feature is particularly useful when you're on a longer trip without the possibility to change your Icebreaker underwear. It is not even a problem to wash it on the go. Icebreaker underwear is easy to clean, dries quickly, and will be ready for use in no time.

Hiking, trekking, climbing, or skiing: Thanks to its excellent thermal performance, Icebreaker underwear is the perfect bottom layer for all outdoor activities. Extremely thin, highly breathable, insulating, easy to clean, odour neutral, and resistant to dirt. Underwear by Icebreaker comprises all these outstanding characteristics. What else could outdoor enthusiasts wish for?