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  • SmartWool Boys Classic Thermal Merino Base Layer 1/4 Zip (Toddler/Little Kid/Big Kid)(Black Ski Day)
    • Sale!
      SmartWool Boys Classic Thermal Merino Base Layer 1/4 Zip (Toddler/Little Kid/Big Kid)(Black Ski Day)
    • KIDS' APPAREL
    • SmartWool Boys Classic Thermal Merino Base Layer 1/4 Zip (Toddler/Little Kid/Big Kid)(Black Ski Day)

    • $70.00 Original price was: $70.00.$42.00Current price is: $42.00.
    • Select options This product has multiple variants. The options may be chosen on the product page
  • SmartWool Boys Classic Thermal Merino Base Layer 1/4 Zip (Toddler/Little Kid/Big Kid)(Charcoal Heather)
    • Sale!
      SmartWool Boys Classic Thermal Merino Base Layer 1/4 Zip (Toddler/Little Kid/Big Kid)(Charcoal Heather)
    • KIDS' APPAREL
    • SmartWool Boys Classic Thermal Merino Base Layer 1/4 Zip (Toddler/Little Kid/Big Kid)(Charcoal Heather)

    • $70.00 Original price was: $70.00.$42.00Current price is: $42.00.
    • Select options This product has multiple variants. The options may be chosen on the product page
  • SmartWool Boys Classic Thermal Merino Base Layer 1/4 Zip (Toddler/Little Kid/Big Kid)(Festive Fuchsia Heather)
    • Sale!
      SmartWool Boys Classic Thermal Merino Base Layer 1/4 Zip (Toddler/Little Kid/Big Kid)(Festive Fuchsia Heather)
    • KIDS' APPAREL
    • SmartWool Boys Classic Thermal Merino Base Layer 1/4 Zip (Toddler/Little Kid/Big Kid)(Festive Fuchsia Heather)

    • $70.00 Original price was: $70.00.$42.00Current price is: $42.00.
    • Select options This product has multiple variants. The options may be chosen on the product page
  • SmartWool Boys Classic Thermal Merino Base Layer 1/4 Zip (Toddler/Little Kid/Big Kid)(Nival Blue Heather)
    • Sale!
      SmartWool Boys Classic Thermal Merino Base Layer 1/4 Zip (Toddler/Little Kid/Big Kid)(Nival Blue Heather)
    • KIDS' APPAREL
    • SmartWool Boys Classic Thermal Merino Base Layer 1/4 Zip (Toddler/Little Kid/Big Kid)(Nival Blue Heather)

    • $70.00 Original price was: $70.00.$42.00Current price is: $42.00.
    • Select options This product has multiple variants. The options may be chosen on the product page
  • SmartWool Boys Classic Thermal Merino Base Layer 1/4 Zip (Toddler/Little Kid/Big Kid)(Purple Iris Heather)
    • Sale!
      SmartWool Boys Classic Thermal Merino Base Layer 1/4 Zip (Toddler/Little Kid/Big Kid)(Purple Iris Heather)
    • KIDS' APPAREL
    • SmartWool Boys Classic Thermal Merino Base Layer 1/4 Zip (Toddler/Little Kid/Big Kid)(Purple Iris Heather)

    • $70.00 Original price was: $70.00.$42.00Current price is: $42.00.
    • Select options This product has multiple variants. The options may be chosen on the product page
  • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Black)
    • Sale!
      Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Black)
    • Holiday Gift Guide
    • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Black)

    • $65.00 Original price was: $65.00.$39.00Current price is: $39.00.
    • Select options This product has multiple variants. The options may be chosen on the product page
  • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Blueberry Mtn Scape)
    • Sale!
      Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Blueberry Mtn Scape)
    • Holiday Gift Guide
    • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Blueberry Mtn Scape)

    • $65.00 Original price was: $65.00.$39.00Current price is: $39.00.
    • Select options This product has multiple variants. The options may be chosen on the product page
  • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Cascade Multi Stripe)
    • Sale!
      Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Cascade Multi Stripe)
    • Holiday Gift Guide
    • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Cascade Multi Stripe)

    • $65.00 Original price was: $65.00.$39.00Current price is: $39.00.
    • Select options This product has multiple variants. The options may be chosen on the product page
  • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Coral Reef)
    • Sale!
      Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Coral Reef)
    • Holiday Gift Guide
    • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Coral Reef)

    • $65.00 Original price was: $65.00.$39.00Current price is: $39.00.
    • Select options This product has multiple variants. The options may be chosen on the product page
  • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Deep Navy Geo Peaks)
    • Sale!
      Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Deep Navy Geo Peaks)
    • Holiday Gift Guide
    • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Deep Navy Geo Peaks)

    • $65.00 Original price was: $65.00.$39.00Current price is: $39.00.
    • Select options This product has multiple variants. The options may be chosen on the product page
  • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Festive Fuschia Floral)
    • Sale!
      Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Festive Fuschia Floral)
    • Holiday Gift Guide
    • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Festive Fuschia Floral)

    • $65.00 Original price was: $65.00.$39.00Current price is: $39.00.
    • Select options This product has multiple variants. The options may be chosen on the product page
  • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Garden Pink Digi Snow)
    • Sale!
      Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Garden Pink Digi Snow)
    • Holiday Gift Guide
    • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Garden Pink Digi Snow)

    • $65.00 Original price was: $65.00.$39.00Current price is: $39.00.
    • Select options This product has multiple variants. The options may be chosen on the product page
  • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Honey Gold)
    • Sale!
      Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Honey Gold)
    • Holiday Gift Guide
    • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Honey Gold)

    • $65.00 Original price was: $65.00.$39.00Current price is: $39.00.
    • Select options This product has multiple variants. The options may be chosen on the product page
  • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Nival Blue Heather)
    • Sale!
      Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Nival Blue Heather)
    • Holiday Gift Guide
    • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Nival Blue Heather)

    • $65.00 Original price was: $65.00.$39.00Current price is: $39.00.
    • Select options This product has multiple variants. The options may be chosen on the product page
  • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Nival Blue Retro Line)
    • Sale!
      Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Nival Blue Retro Line)
    • Holiday Gift Guide
    • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Nival Blue Retro Line)

    • $65.00 Original price was: $65.00.$39.00Current price is: $39.00.
    • Select options This product has multiple variants. The options may be chosen on the product page
  • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Pacific Blue)
    • Sale!
      Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Pacific Blue)
    • Holiday Gift Guide
    • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Pacific Blue)

    • $65.00 Original price was: $65.00.$39.00Current price is: $39.00.
    • Select options This product has multiple variants. The options may be chosen on the product page
  • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Power Pink)
    • Sale!
      Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Power Pink)
    • Holiday Gift Guide
    • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Power Pink)

    • $65.00 Original price was: $65.00.$39.00Current price is: $39.00.
    • Select options This product has multiple variants. The options may be chosen on the product page
  • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Purple Iris Mtn Scape)
    • Sale!
      Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Purple Iris Mtn Scape)
    • Holiday Gift Guide
    • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Purple Iris Mtn Scape)

    • $65.00 Original price was: $65.00.$39.00Current price is: $39.00.
    • Select options This product has multiple variants. The options may be chosen on the product page
  • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Winter Sky Animals)
    • Sale!
      Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Winter Sky Animals)
    • Holiday Gift Guide
    • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Winter Sky Animals)

    • $65.00 Original price was: $65.00.$39.00Current price is: $39.00.
    • Select options This product has multiple variants. The options may be chosen on the product page
  • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Winter Sky Heather)
    • Sale!
      Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Winter Sky Heather)
    • Holiday Gift Guide
    • Smartwool Kid’s Classic Thermal Merino Base Layer Bottoms for Boys and Girls(Toddler/Little Kid/Big Kid)(Winter Sky Heather)

    • $65.00 Original price was: $65.00.$39.00Current price is: $39.00.
    • Select options This product has multiple variants. The options may be chosen on the product page
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Product tags

Added Breathability Body-Mapped Mesh Cold Weather Elasticized Arch Elite Fit System Extended Durability Four-Way Stretch Full Cushion Maximum Cushion Merino Wool Mesh Zone Moisture Management Odor Resistance Over The Calf Performance-Oriented Fit Ribbed Collar Targeted Cushion Temperature Regulation Thermal Merino

Smartwool

Smartwool brings performance Merino wool socks and apparel for hiking, running, snow adventures, and everyday comfort. Explore warmth, durability, and fit.

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