Skip to search results
loaded 22 results

Icebreaker Long Sleeve Base Layer Tops

(22 products)
Products (22)
Remove brand filter:IcebreakerRemove sleeve-length filter:Long SleeveClear all
Sort: Best Match
    Top Rated
    IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Women's
    $51.83 - $120.00
    180 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
    Top Rated
    IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Men's
    $120.00
    223 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    Top Rated
    IcebreakerMerino 125 ZoneKnit Long-Sleeve Half-Zip Base Layer Top - Men's
    $88.73
    Save 34%
    compared to  $135.00
    Save up to 30% extra on your REI Outlet purchase
    16 reviews with an average rating of 4.8 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Big
    REI OUTLET
    Top Rated
    Icebreaker200 Oasis Long-Sleeve Half-Zip Base Layer Top - Women's
    $56.83 - $130.00
    42 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular, Plus
    IcebreakerMerino 200 Oasis Long-Sleeve Crewe Base Layer Top - Women's
    $59.83 - $120.00
    1 reviews with an average rating of 4.0 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    Top Rated
    IcebreakerMerino 200 Sonebula Long-Sleeve Crewe Base Layer Top - Men's
    $89.73
    Save 25%
    compared to  $120.00
    Save up to 30% extra on your REI Outlet purchase
    7 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    REI OUTLET
    Top Rated
    IcebreakerMerino 260 Tech Long-Sleeve Crewe Thermal Top - Men's
    $125.00
    80 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Big
    Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Thermal Top - Women's
    $93.73
    Save 25%
    compared to  $125.00
    Save up to 30% extra on your REI Outlet purchase
    10 reviews with an average rating of 4.1 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
    18 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular
    Top Rated
    IcebreakerMerino 200 ZoneKnit Long-Sleeve Half-Zip Base Layer Top - Men's
    $119.73
    Save 25%
    compared to  $160.00
    Save up to 30% extra on your REI Outlet purchase
    8 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    REI OUTLET
    Top Rated
    IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Base Layer Top - Women's
    $150.00
    37 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Plus
    Top Rated
    Icebreaker200 Oasis Long-Sleeve Half-Zip Base Layer Top - Men's
    $130.00
    36 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    IcebreakerMerino 200 ZoneKnit Long-Sleeve Half-Zip Base Layer Top - Men's
    $127.93
    Save 20%
    compared to  $160.00
    1 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    Top Rated
    Icebreaker260 Tech Long-Sleeve Crewe Base Layer Top - Women's
    $125.00 - $140.00
    49 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular, Plus
    Icebreaker200 ZoneKnit Long-Sleeve Crewe Base Layer Top - Men's
    $119.93
    Save 20%
    compared to  $150.00
    2 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
  • A gift card that reads ‘Best mom ever’ and a yellow Member Bonus Card for $10 that reads ‘Made for life outside’ on a light colored background.

    Celebrate mom

    Give mom the gift of the outdoors with a $100+ gift card and get $10 back as a bonus e-card—just for members! Terms apply.

    Shop gift cards
    Top Rated
    IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Thermal Base Layer Top - Women's
    $89.73
    Save 33%
    compared to  $135.00
    Save up to 30% extra on your REI Outlet purchase
    37 reviews with an average rating of 4.6 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Plus
    REI OUTLET
    Top Rated
    IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Base Layer Top - Men's
    $135.00
    51 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    IcebreakerSiren Sweetheart Long Underwear Top - Women's
    $85.00
    30 reviews with an average rating of 4.5 out of 5 stars
    Underwear Weight:
    Lightweight
    Size Type:
    Regular
    IcebreakerMerino 200 Oasis+ Long-Sleeve Half-Zip Thermal Base Layer Hoodie - Men's
    $150.00
    1 reviews with an average rating of 1.0 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Regular, Big
    IcebreakerMerino 260 ZoneKnit Long-Sleeve Half-Zip Base Layer Top - Men's
    $147.93
    Save 20%
    compared to  $185.00
    1 reviews with an average rating of 5.0 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular
  • The R E I Co-op Mastercard. Earn 15% total R E I rewards.

    Earn 15% in total rewards

    Get 5% on all REI Co-op purchases plus the 10% Co-op Member Reward you earn on eligible full-price purchases.



    Terms apply
    Top Rated
    IcebreakerMerino 200 Oasis Long-Sleeve Half-Zip Thermal Base Layer Top - Women's
    $84.73
    Save 26%
    compared to  $115.00
    Save up to 30% extra on your REI Outlet purchase
    42 reviews with an average rating of 4.7 out of 5 stars
    Underwear Weight:
    Midweight
    Size Type:
    Plus
    REI OUTLET
    Icebreaker300 MerinoFine Polar Long-Sleeve Half-Zip Thermal Base Layer Top - Men's
    $250.00
    7 reviews with an average rating of 3.9 out of 5 stars
    Underwear Weight:
    Heavyweight
    Size Type:
    Regular
Sort: Best Match

Related Expert Advice articles