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Icebreaker Underwear

(72 products)

Products (72)

Sort: Best Match

Top Rated
IcebreakerMerino 200 Oasis Base Layer Leggings with Fly - Men's
$105.00
50 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Crewe Thermal Top - Men's
$125.00
56 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Big
Top Rated
IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Men's
$105.00
118 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Icebreaker260 Tech High-Rise Base Layer Leggings - Women's
$125.00
13 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
IcebreakerMerino 200 Oasis Thermal Leggings - Women's
$105.00
66 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Plus
New arrival
Icebreaker125 ZoneKnit Base Layer Leggings - Men's
$125.00
0 reviews
Underwear Weight:
Ultralightweight
Size Type:
Regular, Big
Top Rated
Icebreaker260 Merino Tech Thermal Leggings with Fly - Men's
$125.00
50 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Big
New arrival
Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Top - Men's
$125.00
4 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Base Layer Top - Men's
$135.00
31 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Icebreaker200 Oasis Crewe Base Layer Top - Men's
$95.00
28 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Top Rated
Icebreaker200 Oasis Long-Sleeve Half-Zip Base Layer Top - Men's
$115.00
16 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Top Rated
IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Women's
$105.00
117 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Plus
Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Base Layer Top - Women's
$66.83 - $135.00
21 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Icebreaker150 Anatomica Crewe Base Layer Top - Men's
$75.00
5 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Top Rated
Icebreaker260 Tech Long-Sleeve Crewe Base Layer Top - Women's
$61.83 - $125.00
31 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Plus
Icebreaker200 Oasis Long-Sleeve Half-Zip Base Layer Top - Women's
$56.83 - $115.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Top Rated
IcebreakerMerino 150 Tech Lite III Relaxed T-Shirt - Women's
$80.00
67 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Icebreaker125 Cool-Lite Merino Blend Sphere III Scoop T-Shirt - Women's
$75.00
17 reviews with an average rating of 4.2 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Icebreaker200 Oasis Cloud Dye Base Layer Leggings - Men's
$115.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Icebreaker260 ZoneKnit Long-Sleeve Crewe Thermal Top - Men's
$165.00
3 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
IcebreakerSprite Racerback Bra
$44.73
Save 25%
compared to $60.00
23 reviews with an average rating of 4.3 out of 5 stars
Bra Support:
Low Impact
Support Style:
Compression
Fabric:
83% merino wool/12% nylon/5% elastane (exclusive of decoration)
REI OUTLET
Icebreaker300 MerinoFine Long-Sleeve Roll-Neck Base Layer Top - Women's
$164.73
Save 25%
compared to $220.00
4 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
IcebreakerMerino 260 Vertex Long-Sleeve Crewe Glacial Flow Base Layer Top - Women's
$104.73
Save 25%
compared to $140.00
3 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular
REI OUTLET
IcebreakerMerino 260 Vertex Natural Shades Base Layer Leggings - Women's
$104.73
Save 25%
compared to $140.00
3 reviews with an average rating of 5.0 out of 5 stars
Size Type:
Regular
REI OUTLET
IcebreakerMerino 260 Vertex Glacial Flow Base Layer Leggings - Women's
$104.73
Save 25%
compared to $140.00
3 reviews with an average rating of 4.0 out of 5 stars
Size Type:
Regular
REI OUTLET
Top Rated
Icebreaker175 Everyday Base Layer Leggings - Women's
$63.73
Save 25%
compared to $85.00
16 reviews with an average rating of 4.9 out of 5 stars
Size Type:
Regular
REI OUTLET
IcebreakerMerino 250 Vertex Long-Sleeve Half-Zip Thermal Top Sedimentary - Women's
$89.73
Save 40%
compared to $150.00
4 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
Top Rated
Icebreaker175 Everyday Long-Sleeve Crewe Base Layer Top - Women's
$56.73
Save 33%
compared to $85.00
18 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Turtleneck Base Layer - Men's
$135.00
8 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
IcebreakerMerino 200 Sonebula Thermal Base Layer Leggings - Women's
$120.00
9 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular

1–30 of 72 products

Sort: Best Match

Related Expert Advice articles

What material is best?

Wool is moisture-wicking and odor-resistant, while synthetic fabrics are more durable and less expensive.

Match the temp to the trek

Lightweight layers are best for moderate to cool temperatures. Midweight layers are best for cold temperatures. Heavyweight layers are best for below-freezing temperatures.

Find your fit

To be able to wick sweat efficiently, your next-to-skin layer needs to actually be next to your skin. A comfortably snug fit everywhere is your goal.

Read full article: How to Choose Base Layers

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