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Smartwool
Thermal Underwear

Women’s thermal underwear
men’s thermal underwear
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33 items
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Smiling man with light hair tied back wearing a fitted black long-sleeve shirt and matching pants against a plain light background.

SmartwoolALL-SEASON BASE - Undershirt - black

€119.95

Man wearing a fitted long-sleeve blue shirt and matching blue pants against a plain light gray background.

SmartwoolALL-SEASON BASE - Undershirt - nightfall blue

€119.95

Man with shoulder-length curly hair wearing a black long-sleeve zip-up top and black pants, standing with one hand on hip.

SmartwoolCLASSIC ALL-SEASON - Undershirt - black

€99.95

Smiling man wearing a fitted blue long-sleeve shirt and black pants stands against a plain white background.
  • Deal

SmartwoolCLASSIC ALL-SEASON - Undershirt - nightfall blue

€75.95

Last lowest price:€89.95-16%

Man wearing fitted blue thermal leggings and long-sleeve top, adjusting waistband, standing barefoot on light gray background.

SmartwoolALL-SEASON - Base layer - nightfall blue

€119.95

Black puffer jacket with hood over a black hoodie, paired with light camo cargo pants. Black footwear. Textured brick wall in background.
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Navy long-sleeve zip-up top and fitted gray leggings. Both made of soft, stretchy fabric. No patterns; smooth texture and athletic design.

SmartwoolUndershirt - deep navy

€124.95

Black long-sleeve top made of soft, stretch fabric. Features a rounded neckline, raglan sleeves, and subtle seam detailing.
  • Deal

SmartwoolUndershirt - black

€96.95

Last lowest price:€114.95-16%

Close-up of a person wearing teal fitted leggings and matching top, standing barefoot with one foot slightly raised on a plain background.

SmartwoolALL SEASON - Base layer - dusty teal

€119.95

Long-sleeve, fitted athletic shirt made of textured green fabric, featuring a crew neckline and seamless shoulder design.
  • Deal

SmartwoolCLASSIC ALL-SEASON - Undershirt - fern green

€75.95

Regular price:€89.95-16%

Woman with curly hair wearing a blue long-sleeve zip-up top and matching pants, smiling, standing with hands clasped.

SmartwoolCLASSIC ALL-SEASON MERINO BASE L - Undershirt - nightfall blue

€99.95

Black long-sleeve top with a zippered collar, made of lightweight fabric. Features seamless shoulders and a small multicolored logo on the sleeve.
  • Deal

SmartwoolCLASSIC ALL-SEASON MERINO BASE L - Undershirt - black

€84.95

Last lowest price:€99.95-15%

Person wearing black fitted leggings and long-sleeve top, standing barefoot against a plain background.

SmartwoolALL SEASON - Base layer - black

€119.95

Black long-sleeve base layer shirt with a slim fit, made of lightweight, textured fabric, featuring mesh accents on the sleeves.
  • Deal

SmartwoolINTRAKNIT THERMAL MERINO BASE LAYER CREW - Undershirt - black/white

€113.95

Last lowest price:€134.95-16%

Black zip-up long-sleeve top with raglan sleeves and a fitted design. Smooth texture, minimal branding, and a high collar for warmth.
  • Deal

SmartwoolCLASSIC THERMAL - Undershirt - black

€105.95

Last lowest price:€124.95-15%

Dark green long-sleeve shirt featuring a textured, lighter green panel across the chest, with black side accents and a crew neckline.
  • Deal

SmartwoolUndershirt - winter moss north woods

€83.95

Last lowest price:€119.95-30%

Light grey long-sleeve athletic shirt with textured stripes, raglan sleeves, and a rounded neckline. Features a small logo accent on the sleeve.
  • Deal

SmartwoolUndershirt - light gray color shift

€96.95

Last lowest price:€114.95-16%

Young man smiling, wearing olive green long-sleeve fitted shirt and dark athletic pants, standing with one hand on hip.

SmartwoolALL-SEASON BASE - Undershirt - winter moss

€119.95

Woman wearing fitted black long-sleeve top and matching black leggings, smiling and standing against a plain light gray background.

SmartwoolALL-SEASON BASE - Undershirt - black

€119.95

Men's activewear: long-sleeve navy shirt with red and gray stripes, paired with dark gray leggings. Both made from stretchable fabric.

SmartwoolCLASSIC THERMAL MERINO BASE LAYER - Base layer - charcoal heather

€114.95

Black leggings with a form-fitting design, featuring textured patterns and contrasting stripes along the legs. Made from flexible material.

SmartwoolINTRAKNIT THERMAL MERINO BASE LAYER - Base layer - black white

€134.95

Person wearing fitted lavender leggings and matching long-sleeve top, standing barefoot on a plain light background.

SmartwoolALL SEASON - Base layer - purple storm

€119.95

Blonde woman wearing fitted long-sleeve lavender top and matching leggings stands against plain gray background, hands gently clasped.

SmartwoolALL-SEASON BASE - Undershirt - purple storm

€119.95

Long-sleeve, fitted shirt in dark gray, made from a textured fabric. Features a crew neck and minimal stitching. Small logo on the sleeve.

SmartwoolUndershirt - charcoal heather

€114.95

Long-sleeve athletic shirt in dark gray, made from a smooth, lightweight fabric featuring a round neckline and fitted design.

SmartwoolCLASSIC ALL-SEASON - Undershirt - iron heather

€89.95

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