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Merino Wool Underwear

(283 products)
Products (283)
Remove features filter:Merino Wool
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    REI Co-opMerino Bikini Underwear - Women's
    $27.95
    54 reviews with an average rating of 4.2 out of 5 stars
    Size Type:
    Regular, Plus
    REI Co-opMerino Boxer Briefs - Men's
    $39.95
    106 reviews with an average rating of 4.2 out of 5 stars
    Size Type:
    Regular, Big
    REI Co-opMerino Hipster Underwear - Women's
    $29.95
    49 reviews with an average rating of 4.0 out of 5 stars
    Size Type:
    Regular, Plus
  • Sale Ends Dec 8
    REI Co-opMerino 185 Base Layer Bottoms - Men's
    $55.89
    Save 30%
    compared to  $79.95
    132 reviews with an average rating of 4.3 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends Dec 8
    Top Rated
    REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's
    $55.89
    Save 30%
    compared to  $79.95
    190 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    REI Co-opMerino Boxers - Men's
    $39.95
    69 reviews with an average rating of 4.3 out of 5 stars
    Size Type:
    Regular, Big
    Top Rated
    REI Co-opMerino Bralette
    $44.95
    173 reviews with an average rating of 4.6 out of 5 stars
    Bra Support:
    Low Impact
    Support Style:
    Encapsulation
    Fabric:
    48% merino wool/32% TENCEL lyocell/15% nylon/5% LYCRA spandex
    Top Rated
    REI Co-opHeavyweight Merino Base Layer Bottoms - Men's
    $99.95
    9 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Big, Tall
    tasc PerformanceElevation Merino T-Shirt - Men's
    $54.73
    Save 30%
    compared to  $79.00
    Members use code CYBER2025 to save an extra 25% on this item, thru 12/1
    41 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Big, Regular
    REI OUTLET
    SmartwoolEveryday 6" Knit Boxer Briefs - Men's
    $35.73
    Save 25%
    compared to  $48.00
    Members use code CYBER2025 to save an extra 25% on this item, thru 12/1
    1 reviews with an average rating of 5.0 out of 5 stars
    Size Type:
    Regular
    REI OUTLET
    tasc PerformanceElevation Merino Base Layer Bottoms - Men's
    $34.73 - $54.73
    Save 30% - 56%
    compared to  $79.00
    Members use code CYBER2025 to save an extra 25% on this item, thru 12/1
    35 reviews with an average rating of 3.8 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Big, Regular
    REI OUTLET
    Top Rated
    SmartwoolClassic Thermal Merino Crew Base Layer Top - Women's
    $86.19 - $115.00
    1168 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
    REI Co-opHeavyweight Merino Long-Sleeve Base Layer Crew Top - Men's
    $99.95
    29 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Big, Tall
  • Sale Ends Today
    SmartwoolClassic Thermal Merino Base Layer Bottoms - Women's
    $86.19
    Save 25%
    compared to  $115.00
    740 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
  • Sale Ends Dec 8
    Top Rated
    REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's
    $62.89
    Save 30%
    compared to  $89.95
    111 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends Today
    Top Rated
    SmartwoolClassic Thermal Merino Base Layer Bottoms - Men's
    $86.19
    Save 25%
    compared to  $115.00
    624 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    tasc PerformanceElevation Merino T-Shirt - Women's
    $54.73
    Save 30%
    compared to  $79.00
    Members use code CYBER2025 to save an extra 25% on this item, thru 12/1
    80 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
    REI OUTLET
    Top Rated
    REI Co-opHeavyweight Merino Base Layer Bottoms - Women's
    $99.95
    23 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Plus
  • Sale Ends Dec 8
    REI Co-opMerino 185 Base Layer Bottoms - Women's
    $55.89
    Save 30%
    compared to  $79.95
    105 reviews with an average rating of 4.3 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    Top Rated
    REI Co-opHeavyweight Merino Long-Sleeve Base Layer Crew Top - Women's
    $99.95
    31 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Plus
    tasc PerformanceElevation Merino Base Layer Bottoms - Women's
    $54.73
    Save 30%
    compared to  $79.00
    Members use code CYBER2025 to save an extra 25% on this item, thru 12/1
    57 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    REI OUTLET
  • Sale Ends Today
    Top Rated
    SmartwoolClassic Thermal Merino Crew Base Layer Top - Men's
    $86.19
    Save 25%
    compared to  $115.00
    1507 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
  • Sale Ends Dec 8
    REI Co-opMerino 185 Long-Sleeve Base Layer Top - Women's
    $55.89
    Save 30%
    compared to  $79.95
    205 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
  • Sale Ends Today
    SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Men's
    $67.49
    Save 25%
    compared to  $90.00
    67 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends Dec 8
    REI Co-opMerino 185 Base Layer Top - Men's
    $48.89
    Save 30%
    compared to  $69.95
    54 reviews with an average rating of 4.2 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
  • Sale Ends Today
    Top Rated
    SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Men's
    $89.99
    Save 25%
    compared to  $120.00
    31 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Women's
    $67.49 - $90.00
    127 reviews with an average rating of 4.4 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
    Top Rated
    Kari TraaRose Half-Zip Base Layer Top - Women's
    $140.00
    49 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
    Top Rated
    SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Women's
    $89.99 - $120.00
    37 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
  • Sale Ends Dec 8
    Top Rated
    IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Women's
    $78.69
    Save 25%
    compared to  $105.00
    157 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
1–30 of 283 products
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