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Baselayers
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  • Icebreaker Men's Merino 200 Oasis Crewe Thermal Top Black / Small - 53 Degrees North Icebreaker Men's Merino 200 Oasis Crewe Thermal Top Black / Small - 53 Degrees North

    Icebreaker

    Men's Merino 200 Oasis Crewe Thermal Top

    Baselayer Tops

    • Lightweight 200 merino
    • Slim fit
    • Drop tail hem
    In stock
    €10000
  • Icebreaker Women's 200 Oasis Long Sleeve Crewe Undyed / X-Small - 53 Degrees North Icebreaker Women's 200 Oasis Long Sleeve Crewe Undyed / X-Small - 53 Degrees North

    Icebreaker

    Women's 200 Oasis Long Sleeve Crewe

    Baselayer Tops

    • Lightweight 200 merino
    • Crew neck
    • Drop tail hem
    (1)
    In stock
    €10000
  • Icebreaker Men's Merino 200 Oasis Thermal Leggings Black / Small - 53 Degrees North Icebreaker Men's Merino 200 Oasis Thermal Leggings Black / Small - 53 Degrees North

    Icebreaker

    Men's Merino 200 Oasis Thermal Leggings

    Baselayer Pants

    • 100% merino wool
    • Gusseted
    • Flatlock seams
    In stock
    €10000
  • ODLO Women's Active Warm Eco Baselayer Top White / X-Small - 53 Degrees North ODLO Women's Active Warm Eco Baselayer Top Fudge / X-Small - 53 Degrees North
    Sale

    Odlo

    Women's Active Warm Baselayer Top

    Baselayer Tops

    • Crew neck
    • HeiQ Mint
    • Recycled polyester
    In stock
    From €4800 €6000 Save 20%
  • ODLO Men's Active Warm Eco Baselayer Top Black / Small - 53 Degrees North ODLO Men's Active Warm Eco Baselayer Top Black / Small - 53 Degrees North

    Odlo

    Men's Active Warm Baselayer Top

    Baselayer Tops

    • Crew neck
    • HeiQ Mint
    • Recycled polyester
    In stock
    €6000
  • ODLO Kids' Active Warm Eco Baselayer Top Black / Age 3-4 - 53 Degrees North ODLO Kids' Active Warm Eco Baselayer Top Black / Age 3-4 - 53 Degrees North
    Sale

    Odlo

    Kids' Active Warm Baselayer Top

    Baselayer Tops

    • Long sleeve
    • Recycled polyester
    • Stretchy
    In stock
    From €1500 €2500 Save 40%
  • Icebreaker Women's Merino 200 Oasis Leggings Black / X-Small - 53 Degrees North Icebreaker Women's Merino 200 Oasis Leggings Black / X-Small - 53 Degrees North

    Icebreaker

    Women's Merino 200 Oasis Leggings

    Baselayer Pants

    • 100% merino wool
    • 74.6 cm inseam
    • Flatlock seams
    In stock
    €10000
  • Icebreaker Men's Merino 260 Tech Long Sleeve Crewe Thermal Top Black / Small - 53 Degrees North Icebreaker Men's Merino 260 Tech Long Sleeve Crewe Thermal Top Loden / Small - 53 Degrees North

    Icebreaker

    Men's Merino 260 Tech Long Sleeve Crewe Thermal Top

    Baselayer Tops

    • Midweight 260 merino
    • Slim fit
    • Offset shoulder seams
    In stock
    €12000
  • Icebreaker Men's 200 Oasis Long Sleeve Half Zip Baselayer Black / Small - 53 Degrees North Icebreaker Men's 200 Oasis Long Sleeve Half Zip Baselayer Black / Small - 53 Degrees North

    Icebreaker

    Men's 200 Oasis Long Sleeve Half Zip Baselayer

    Baselayer Tops

    • 200 merino
    • Half zip
    • Drop-tail hem
    In stock
    €11000
  • Icebreaker Men's 200 Oasis Long Sleeve Crewe Flagstone / Small - 53 Degrees North Icebreaker Men's 200 Oasis Long Sleeve Crewe Flagstone / Small - 53 Degrees North

    Icebreaker

    Men's 200 Oasis Long Sleeve Crewe

    Baselayer Tops

    In stock
    €10000
  • Icebreaker Men's Merino 260 Tech Leggings Black / Small - 53 Degrees North Icebreaker Men's Merino 260 Tech Leggings Black / Small - 53 Degrees North

    Icebreaker

    Men's Merino 260 Tech Leggings

    Baselayer Pants

    • 260 merino
    • Gusset
    • Flatlock seams
    In stock
    €12000
  • Icebreaker Women's 260 Oasis Long Sleeve Crewe in Pink Quartz Icebreaker Women's 260 Oasis Long Sleeve Crewe

    Icebreaker

    Women's 260 Oasis Long Sleeve Crewe

    Baselayer Tops

    • Midweight 260 merino
    • Crew neck
    • Slim fit
    In stock
    €12000
  • Icebreaker Women's 200 Oasis Long Sleeve Half Zip in Dark Berry Icebreaker Women's 200 Oasis Long Sleeve Half Zip

    Icebreaker

    Women's 200 Oasis Long Sleeve Half Zip

    Baselayer Tops

    • Lightweight 200 merino
    • Half zip
    • Drop tail hem
    In stock
    €11000
  • ODLO Men's Active Warm Eco Half Zip Turtleneck Baselayer Top Black / Small - 53 Degrees North ODLO Men's Active Warm Eco Half Zip Turtleneck Baselayer Top Black / Small - 53 Degrees North

    Odlo

    Men's Active Warm Half Zip Turtleneck Baselayer Top

    Baselayer Tops

    • Half zip
    • Chin guard
    • HeiQ Mint
    In stock
    €6500
  • ODLO Kids' Active Warm Eco Baselayer Bottoms Black / Age 3-4 - 53 Degrees North ODLO Kids' Active Warm Eco Baselayer Bottoms Black / Age 3-4 - 53 Degrees North

    Odlo

    Kids' Active Warm Baselayer Bottoms

    Baselayer Pants

    • Recycled polyester
    • Stretchy
    • Next-to-skin fit
    In stock
    From €3000
  • Icebreaker Men's Merino 260 Tech Long Sleeve Turtleneck Black / Small - 53 Degrees North Icebreaker Men's Merino 260 Tech Long Sleeve Turtleneck Black / Small - 53 Degrees North

    Icebreaker

    Men's Merino 260 Oasis Long Sleeve Turtleneck

    Baselayer Tops

    • Midweight 260 merino
    • Turtleneck
    • Slim fit
    In stock
    €13000
  • Icebreaker Women's 260 Tech Half Zip Merino Baselayer Blush / X-Small - 53 Degrees North Icebreaker Women's 260 Tech Half Zip Merino Baselayer Blush / X-Small - 53 Degrees North

    Icebreaker

    Women's 260 Tech Half Zip Merino Baselayer

    Baselayer Tops

    (1)
    In stock
    €14000
  • Icebreaker Women's 260 Tech Long Sleeve Turtleneck Top Black / X-Small - 53 Degrees North Icebreaker Women's 260 Tech Long Sleeve Turtleneck Top Black / X-Small - 53 Degrees North

    Icebreaker

    Women's 260 Oasis Long Sleeve Turtleneck Top

    Baselayer Tops

    • Midweight 260 merino
    • Turtleneck
    • Slim fit
    In stock
    €13000

Base layers and thermals for every kind of cold

The right base layer comes down to three things: how hard you will be working, what it is made from and how warm it needs to be. Get those right and you stay dry and comfortable from the car park to the summit, or from the first lift to the last run.

Start with how hard you will be working

High-output days like fast hiking, running or ski touring call for a lighter layer that dries quickly. Slower, colder days like a winter walk, a day on the piste or standing at the sideline suit a warmer, heavier layer that traps more heat.

Merino or synthetic

Merino wool from Icebreaker and Smartwool is soft, regulates temperature well and naturally resists odour, so it suits multi-day trips and travel. Synthetic layers such as Patagonia Capilene and Odlo Active Warm are built from polyester that wicks and dries fast and stands up to hard wear. Browse our merino base layers if natural fibre is your priority.

Pick the warmth

Most ranges come in weights. Patagonia Capilene runs from Lightweight through Midweight to Thermal Weight, and Icebreaker merino runs from the lighter 200 Oasis to the warmer 260 Tech. The colder and slower the day, the heavier the weight.

Fit matters

A base layer works best fitted close to the skin, so it can pick up moisture and move it outward. Wear it under a fleece or midlayer and a shell, and see our guide on how to layer clothing for the full system.

Shop by need: men's base layers, women's base layers, kids' base layers and ski base layers.

Frequently asked questions

What does a base layer do?

A base layer sits next to your skin and moves sweat away from your body so you stay dry, while holding a layer of warm air close to you. Staying dry is what keeps you warm once you stop moving.

Is merino or synthetic better for a base layer?

Both work well. Merino is soft, regulates temperature and naturally resists odour, which suits multi-day trips. Synthetic layers dry faster and are very hard-wearing, which suits high-output days and frequent washing.

Should a base layer be tight?

A base layer should sit close to your skin without restricting movement. A close fit lets the fabric pick up moisture and move it away, which a loose layer cannot do as well.

Can I wear a base layer on its own?

Yes. Lightweight base layers work well on their own for cool-weather hiking or running, and many people wear merino tops as everyday wear. In colder weather, add a midlayer and a shell on top.

Can I collect orders in store?

Yes, choose Click & Collect at checkout. Orders are usually ready within 24 hours and you will get an email when ready. Available from our Dublin Carrickmines, Dublin Blanchardstown and Cork City Centre stores.

Do you offer free delivery on orders?

Yes, we offer free standard delivery on all orders over €100.

Where are your stores located?

We have four stores across Ireland: Dublin Carrickmines, Dublin Blanchardstown, Cork City Centre and Arnotts Dublin.

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