Thermal Baselayers
Couple wearing Heat Holders thermal base layers outside an alpine hut
The phenomenal success of our Heat Holders® socks has led to the development of additional Heat Holders® products. Our Baselayers, available in various colors and sizes, will keep you warm on those cold winter days. Choose a style to buy now or narrow your selection to Men's or Women's styles.
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Original
ORIGINAL WARMEST
LITE WARMER
ULTRA LITE WARM
Model 4 #color_black
Ghost
7 Reviews
Men's ORIGINAL™ Base Layer Zip Top
$29.99

Men's ORIGINAL™ Base Layer Zip Top

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Men’s Ceramic Base Layer Top
Men’s Ceramic Base Layer Top
Men’s Ceramic Base Layer Top
$54.99

Men’s Ceramic Base Layer Top

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Men’s Ceramic Base Layer Pants
Men’s Ceramic Base Layer Pants
3 Reviews
Men’s Ceramic Base Layer Pants
$54.99

Men’s Ceramic Base Layer Pants

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Ultra Lite
ORIGINAL WARMEST
LITE WARMER
ULTRA LITE WARM
Model 4
Model 2
12 Reviews
Men's ULTRA LITE™ Base Layer Mock Neck Top
$29.99
Women’s Ceramic Base Layer Top
Women’s Ceramic Base Layer Top
2 Reviews
Women’s Ceramic Base Layer Top
$54.99

Women’s Ceramic Base Layer Top

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Women’s Ceramic Base Layer Pants
Women’s Ceramic Base Layer Pants
2 Reviews
Women’s Ceramic Base Layer Pants
$54.99

Women’s Ceramic Base Layer Pants

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Ultra Lite
ORIGINAL WARMEST
LITE WARMER
ULTRA LITE WARM
Model 4
Model 5
4 Reviews
Men's ULTRA LITE™ Base Layer Zip Top
$29.99

Men's ULTRA LITE™ Base Layer Zip Top

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Original
ORIGINAL WARMEST
LITE WARMER
ULTRA LITE WARM
Men's ORIGINAL™ Expedition Base Layer Crew Top
Men's ORIGINAL™ Expedition Base Layer Crew Top
Men's ORIGINAL™ Expedition Base Layer Crew Top
$29.99

Men's ORIGINAL™ Expedition Base Layer Crew Top

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Original
ORIGINAL WARMEST
LITE WARMER
ULTRA LITE WARM
Men's ORIGINAL™ Expedition Base Layer Pants
Men's ORIGINAL™ Expedition Base Layer Pants
Men's ORIGINAL™ Expedition Base Layer Pants
$29.99

Men's ORIGINAL™ Expedition Base Layer Pants

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Lite
ORIGINAL WARMEST
LITE WARMER
ULTRA LITE WARM
Men's LITE™ Traverse Base Layer Crew Top
Men's LITE™ Traverse Base Layer Crew Top
Men's LITE™ Traverse Base Layer Crew Top
$27.99

Men's LITE™ Traverse Base Layer Crew Top

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Lite
ORIGINAL WARMEST
LITE WARMER
ULTRA LITE WARM
Men's LITE™ Traverse Base Layer Pants
Men's LITE™ Traverse Base Layer Pants
Men's LITE™ Traverse Base Layer Pants
$27.99

Men's LITE™ Traverse Base Layer Pants

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Ultra Lite
ORIGINAL WARMEST
LITE WARMER
ULTRA LITE WARM
Men's ULTRA LITE™ Ascent Base Layer Crew Top
Men's ULTRA LITE™ Ascent Base Layer Crew Top
Men's ULTRA LITE™ Ascent Base Layer Crew Top
From $24.99

Men's ULTRA LITE™ Ascent Base Layer Crew Top

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Ultra Lite
ORIGINAL WARMEST
LITE WARMER
ULTRA LITE WARM
Men's ULTRA LITE™ Ascent Base Layer Pants
Men's ULTRA LITE™ Ascent Base Layer Pants
Men's ULTRA LITE™ Ascent Base Layer Pants
From $24.99

Men's ULTRA LITE™ Ascent Base Layer Pants

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Original
ORIGINAL WARMEST
LITE WARMER
ULTRA LITE WARM
Women's ORIGINAL™ Arctic Base Layer Crew Top
Women's ORIGINAL™ Arctic Base Layer Crew Top
8 Reviews
Women's ORIGINAL™ Arctic Base Layer Crew Top
$29.99

Women's ORIGINAL™ Arctic Base Layer Crew Top

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Original
ORIGINAL WARMEST
LITE WARMER
ULTRA LITE WARM
Women's ORIGINAL™ Arctic Base Layer Pants
Women's ORIGINAL™ Arctic Base Layer Pants
8 Reviews
Women's ORIGINAL™ Arctic Base Layer Pants
$29.99

Women's ORIGINAL™ Arctic Base Layer Pants

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Lite
ORIGINAL WARMEST
LITE WARMER
ULTRA LITE WARM
Women's LITE™ Horizon Base Layer Crew Top
Women's LITE™ Horizon Base Layer Crew Top
Women's LITE™ Horizon Base Layer Crew Top
$27.99

Women's LITE™ Horizon Base Layer Crew Top

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Lite
ORIGINAL WARMEST
LITE WARMER
ULTRA LITE WARM
Women's LITE™ Horizon Base Layer Pants
Women's LITE™ Horizon Base Layer Pants
Women's LITE™ Horizon Base Layer Pants
$27.99

Women's LITE™ Horizon Base Layer Pants

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Ultra Lite
ORIGINAL WARMEST
LITE WARMER
ULTRA LITE WARM
Women's ULTRA LITE™ Drift Base Layer Crew Top
Women's ULTRA LITE™ Drift Base Layer Crew Top
Women's ULTRA LITE™ Drift Base Layer Crew Top
From $24.99

Women's ULTRA LITE™ Drift Base Layer Crew Top

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Ultra Lite
ORIGINAL WARMEST
LITE WARMER
ULTRA LITE WARM
Women's ULTRA LITE™ Drift Base Layer Pants
Women's ULTRA LITE™ Drift Base Layer Pants
Women's ULTRA LITE™ Drift Base Layer Pants
From $24.99

Women's ULTRA LITE™ Drift Base Layer Pants

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Women's ORIGINAL™ Arctic Matching Base Layer Set - Black
Women's ORIGINAL™ Arctic Matching Base Layer Set - Black
Women's ORIGINAL™ Arctic Matching Base Layer Set - Black
$54.98 $59.98

Women's ORIGINAL™ Arctic Matching Base Layer Set - Black

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Choose Women's ORIGINAL™ Arctic Base Layer Pants (Size):

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Women's LITE™ Horizon Base Layer Set in Black
Women's LITE™ Horizon Base Layer Set in Black
Women's LITE™ Horizon Base Layer Set in Black
$50.98 $55.98

Women's LITE™ Horizon Base Layer Set in Black

Choose Women's LITE™ Horizon Base Layer Crew Top (Size):

Choose Women's LITE™ Horizon Base Layer Crew Top (Size)

Choose Women's LITE™ Horizon Base Layer Pants (Size):

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Men's Original Expedition Base Layer Thermal Set in Black
Men's Original Expedition Base Layer Thermal Set in Black
Men's Original Expedition Base Layer Thermal Set in Black
$54.98 $59.98

Men's Original Expedition Base Layer Thermal Set in Black

Choose Men's ORIGINAL™ Expedition Base Layer Crew Top (Size):

Choose Men's ORIGINAL™ Expedition Base Layer Crew Top (Size)

Choose Men's ORIGINAL™ Expedition Base Layer Pants (Size):

Choose Men's ORIGINAL™ Expedition Base Layer Pants (Size)

Women's ORIGINAL™ Arctic Matching Base Layer Set - Navy
Women's ORIGINAL™ Arctic Matching Base Layer Set - Navy
Women's ORIGINAL™ Arctic Matching Base Layer Set - Navy
$54.98 $59.98

Women's ORIGINAL™ Arctic Matching Base Layer Set - Navy

Choose Women's ORIGINAL™ Arctic Base Layer Crew Top (Size):

Choose Women's ORIGINAL™ Arctic Base Layer Crew Top (Size)

Choose Women's ORIGINAL™ Arctic Base Layer Pants (Size):

Choose Women's ORIGINAL™ Arctic Base Layer Pants (Size)

Women's Ultra LITE™ Drift Base Layer Set in Grey Heather
Women's Ultra LITE™ Drift Base Layer Set in Grey Heather
Women's Ultra LITE™ Drift Base Layer Set in Grey Heather
$44.98 $49.98

Women's Ultra LITE™ Drift Base Layer Set in Grey Heather

Choose Women's ULTRA LITE™ Drift Base Layer Crew Top (Size):

Choose Women's ULTRA LITE™ Drift Base Layer Crew Top (Size)

Choose Women's ULTRA LITE™ Drift Base Layer Pants (Size):

Choose Women's ULTRA LITE™ Drift Base Layer Pants (Size)

Men's Ultra Lite Ascent Base Layer Thermal Set in Grey Heather
Men's Ultra Lite Ascent Base Layer Thermal Set in Grey Heather
Men's Ultra Lite Ascent Base Layer Thermal Set in Grey Heather
$44.98 $49.98

Men's Ultra Lite Ascent Base Layer Thermal Set in Grey Heather

Choose Men's ULTRA LITE™ Ascent Base Layer Crew Top (Size):

Choose Men's ULTRA LITE™ Ascent Base Layer Crew Top (Size)

Choose Men's ULTRA LITE™ Ascent Base Layer Pants (Size):

Choose Men's ULTRA LITE™ Ascent Base Layer Pants (Size)

Men's LITE™ Traverse Base Layer Thermal Set in Black
Men's LITE™ Traverse Base Layer Thermal Set in Black
Men's LITE™ Traverse Base Layer Thermal Set in Black
$50.98 $55.98

Men's LITE™ Traverse Base Layer Thermal Set in Black

Choose Men's LITE™ Traverse Base Layer Crew Top (Size):

Choose Men's LITE™ Traverse Base Layer Crew Top (Size)

Choose Men's LITE™ Traverse Base Layer Pants (Size):

Choose Men's LITE™ Traverse Base Layer Pants (Size)

Women's Ultra LITE™ Drift Base Layer Set in Black
Women's Ultra LITE™ Drift Base Layer Set in Black
Women's Ultra LITE™ Drift Base Layer Set in Black
$44.98 $49.98

Women's Ultra LITE™ Drift Base Layer Set in Black

Choose Women's ULTRA LITE™ Drift Base Layer Crew Top (Size):

Choose Women's ULTRA LITE™ Drift Base Layer Crew Top (Size)

Choose Women's ULTRA LITE™ Drift Base Layer Pants (Size):

Choose Women's ULTRA LITE™ Drift Base Layer Pants (Size)

Men's LITE™ Traverse Base Layer Thermal Set in Charcoal Heather
Men's LITE™ Traverse Base Layer Thermal Set in Charcoal Heather
Men's LITE™ Traverse Base Layer Thermal Set in Charcoal Heather
$50.98 $55.98

Men's LITE™ Traverse Base Layer Thermal Set in Charcoal Heather

Choose Men's LITE™ Traverse Base Layer Crew Top (Size):

Choose Men's LITE™ Traverse Base Layer Crew Top (Size)

Choose Men's LITE™ Traverse Base Layer Pants (Size):

Choose Men's LITE™ Traverse Base Layer Pants (Size)

Men's Original Expedition Base Layer Thermal Set in Charcoal
Men's Original Expedition Base Layer Thermal Set in Charcoal
Men's Original Expedition Base Layer Thermal Set in Charcoal
$50.98 $59.98

Men's Original Expedition Base Layer Thermal Set in Charcoal

Choose Men's ORIGINAL™ Expedition Base Layer Crew Top (Size):

Choose Men's ORIGINAL™ Expedition Base Layer Crew Top (Size)

Choose Men's ORIGINAL™ Expedition Base Layer Pants (Size):

Choose Men's ORIGINAL™ Expedition Base Layer Pants (Size)

Women's LITE™ Horizon Base Layer Set in Navy
Women's LITE™ Horizon Base Layer Set in Navy
Women's LITE™ Horizon Base Layer Set in Navy
$50.98 $55.98

Women's LITE™ Horizon Base Layer Set in Navy

Choose Women's LITE™ Horizon Base Layer Crew Top (Size):

Choose Women's LITE™ Horizon Base Layer Crew Top (Size)

Choose Women's LITE™ Horizon Base Layer Pants (Size):

Choose Women's LITE™ Horizon Base Layer Pants (Size)

Men's Ultra Lite Ascent Base Layer Thermal Set in Black
Men's Ultra Lite Ascent Base Layer Thermal Set in Black
Men's Ultra Lite Ascent Base Layer Thermal Set in Black
$44.98 $49.98

Men's Ultra Lite Ascent Base Layer Thermal Set in Black

Choose Men's ULTRA LITE™ Ascent Base Layer Crew Top (Size):

Choose Men's ULTRA LITE™ Ascent Base Layer Crew Top (Size)

Choose Men's ULTRA LITE™ Ascent Base Layer Pants (Size):

Choose Men's ULTRA LITE™ Ascent Base Layer Pants (Size)