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Women's thermal top Active Comfort LS blue
A base layer top only works when it touches your skin — so choose a close-fitting cut, not a loose one.
Merino has an advantage on multi-day trips because it keeps you warm even when damp and doesn't start to smell after the second day; synthetics are more durable and dry much faster, which you will appreciate during intense activity. A longer back and a slightly extended sleeve with a thumbhole will prevent cold wrists under a jacket. In winter, leave empty space above the base layer so the insulation can trap air.
You might be interested in: Women's short-sleeve base layers, Women's base layer bottoms, Women's knickers, Bras, Women's thermal sets

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Women's thermal top Active Comfort LS blue

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Women's thermal top Active Comfort LS red

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Women's thermal top Active Comfort LS purple

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Women's thermal top Active Comfort LS black

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Women's thermal top Active Comfort LS HZ 2 black

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Women's thermal top Flow HZ LS beige

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Women's thermal top Flow HZ LS black

Aclima
Women's thermal top LightWool Sports Shirt jet black

Aclima
Women's thermal top LightWool Sports Shirt purple impr/navyblazer/northatlantic

Aclima
Women's thermal top WoolNet Hiking Crew Neck fudge / dill / olive night

Aclima
Women's thermal top WoolNet Hiking Mock Neck beige melange /olive night /jet black

Aclima
Women's thermal top WoolNet Hiking Mock Neck jet black/poinciana/capulet

La Sportiva
Women's thermal top WOOL40 AERO LONGSLEEVE black/hibiscus

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Women's thermal top Warm Comfort LS plaster

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Women's thermal top Warm Comfort LS black

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Women's thermal top Thermal Baselayer Longsleeve dk red

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Women's thermal top Thermal Baselayer Longsleeve black

Devold
Women's thermal top Endurance Merino 130 Shirt night

Devold
Women's thermal top Duo Active with zip marsala

Devold
Women's thermal top Duo Active with zip raw white

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Women's thermal top Active Extreme X CN LS pace

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Women's thermal top Active Comfort LS plum taupe

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Women's thermal top Active Comfort LS cadet

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Women's thermal top Wool Comfort RN LS plum taupe

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Women's thermal top Wool Comfort RN LS night

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Women's thermal top Wool Comfort RN LS hay

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Women's thermal top Wool Comfort RN LS black

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Women's thermal top Wool 95 LS CN grey melange

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Women's thermal top Wool 95 LS CN black melange

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Women's thermal top Wool 95 HZ LS grey melange

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Women's thermal top Wool 95 HZ LS black melange
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