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Men's Base Layer Tops
(87 products)Products (87)
Sort: Best Match
- Top Rated
REI Co-opMidweight Base Layer Half-Zip Top - Men's
$29.83 - $59.95Underwear Weight:MidweightSize Type:Regular, Big, Tall REI Co-opLightweight Long-Sleeve Crew Base Layer Top - Men's
$39.95Underwear Weight:LightweightSize Type:Regular, Big, Tall- Top Rated
REI Co-opMidweight Long-Sleeve Base Layer Top - Men's
$54.95Underwear Weight:MidweightSize Type:Regular, Big, Tall - Top Rated
SmartwoolClassic Thermal Merino Crew Base Layer Top - Men's
$56.83 - $115.00Underwear Weight:MidweightSize Type:Regular, Big REI Co-opLightweight Half-Zip Base Layer Top - Men's
$44.95Underwear Weight:LightweightSize Type:Regular, Big, TallREI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's
$79.95Underwear Weight:LightweightSize Type:Regular, Big- Top Rated
REI Co-opLightweight Crew Base Layer Top - Men's
$29.95Underwear Weight:LightweightSize Type:Regular, Big, Tall - Top Rated
SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Men's
$90.00Underwear Weight:LightweightSize Type:Regular, Big tasc PerformanceElevation Merino T-Shirt - Men's
$49.73 - $54.73Save 30% - 37%compared to  $79.00Underwear Weight:LightweightSize Type:Regular, BigREI OUTLETREI Co-opHeavyweight Merino Base Layer Half-Zip Top - Men's
$49.83 - $104.95Underwear Weight:HeavyweightSize Type:Regular, Big, Tall- Top Rated
PatagoniaCapilene Midweight Crew Base Layer Top - Men's
$89.00Underwear Weight:MidweightSize Type:Regular, Big - Top Rated
Icebreaker125 ZoneKnit Merino Long-Sleeve Crewe Thermal Top - Men's
$93.73Save 25%compared to  $125.00Underwear Weight:UltralightweightSize Type:Regular, BigREI OUTLET - Top Rated
REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's
$89.95Underwear Weight:LightweightSize Type:Regular, Big REI Co-opHeavyweight Merino Long-Sleeve Base Layer Crew Top - Men's
$49.83 - $99.95Underwear Weight:HeavyweightSize Type:Regular, BigSmartwoolClassic All-Season Merino Quarter-Zip Base Layer Top - Men's
$95.00Underwear Weight:MidweightSize Type:Regular, BigPatagoniaCapilene Thermal Weight Zip-Neck Top - Men's
$109.00Underwear Weight:HeavyweightSize Type:RegularCraftCORE Dry Active Comfort Base Layer Top - Men's
$39.73Save 38%compared to  $64.95Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET- Top Rated
PatagoniaCapilene Midweight Zip-Neck Base Layer Top - Men's
$99.00Underwear Weight:MidweightSize Type:Regular, Big - Top Rated
SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Men's
$59.83 - $120.00Underwear Weight:MidweightSize Type:Regular, Big - Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Crewe Thermal Top - Men's
$125.00Underwear Weight:HeavyweightSize Type:Regular, Big PatagoniaCapilene Thermal Weight Long Underwear Crew Top - Men's
$99.00Underwear Weight:HeavyweightSize Type:RegularArms of Andes160 Ultralight Alpaca Wool Crewneck Base Layer T-Shirt - Men's
$75.00Underwear Weight:UltralightweightSize Type:Regular, BigIcebreaker200 Oasis Crewe Base Layer Top - Men's
$95.00Underwear Weight:MidweightSize Type:Regular, Big- Top Rated
IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Men's
$105.00Underwear Weight:MidweightSize Type:Regular, Big SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Men's
$64.83 - $130.00Underwear Weight:MidweightSize Type:Regular, Big- Top Rated
REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's Tall Sizes
$89.95Underwear Weight:LightweightSize Type:Tall - Top Rated
SmartwoolIntraknit Thermal Merino Base Layer Quarter-Zip Top - Men's
$69.83 - $140.00Underwear Weight:MidweightSize Type:Regular, Big - Top Rated
Arc'teryxIonia Merino Wool Base Layer Hoody - Men's
$140.00Underwear Weight:MidweightSize Type:Regular, Big - Top Rated
Arc'teryxRho LT Zip-Neck Base Layer Top - Men's
$84.83 - $120.00Underwear Weight:LightweightSize Type:Regular, Big - Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Thermal Base Layer Top - Men's
$99.73Save 26%compared to  $135.00Underwear Weight:HeavyweightSize Type:Regular, BigREI OUTLET SmartwoolClassic All-Season Merino T-Shirt - Men's
$80.00Underwear Weight:LightweightSize Type:Regular, BigArms of Andes160 Ultralight Alpaca Wool Long-Sleeve Base Layer Shirt - Men's
$85.00Underwear Weight:UltralightweightSize Type:Regular, BigIcebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Top - Men's
$125.00Underwear Weight:LightweightSize Type:Regular, BigArms of Andes300 Alpaca Wool Long-Sleeve Crew Base Layer Top - Men's
$130.00Underwear Weight:LightweightSize Type:Regular, BigArms of Andes300 Lightweight Alpaca Wool Half-Zip Base Layer Top - Men's
$135.00Underwear Weight:LightweightSize Type:Regular, Big- Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Base Layer Top - Men's
$135.00Underwear Weight:MidweightSize Type:Regular, Big - Top Rated
Icebreaker200 Oasis Long-Sleeve Half-Zip Base Layer Top - Men's
$115.00Underwear Weight:MidweightSize Type:Regular, Big Ortovox230 Competition Zip-Neck Base Layer Top - Men's
$120.00Underwear Weight:MidweightSize Type:Regular, Big- Top Rated
Arc'teryxIonia Merino Wool Base Layer Top - Men's
$90.00Underwear Weight:MidweightSize Type:Regular, Big Ortovox185 Merino Rock'n'wool Long-Sleeve Base Layer Top - Men's
$110.00Underwear Weight:MidweightSize Type:Regular, Big- Top Rated
REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's Tall Sizes
$79.95Underwear Weight:LightweightSize Type:Tall Ortovox230 Competition Long-Sleeve Base Layer Top - Men's
$110.00Underwear Weight:MidweightSize Type:Regular, Big- Top Rated
Icebreaker150 Anatomica Crewe Base Layer Top - Men's
$75.00Underwear Weight:LightweightSize Type:Regular, Big - Top Rated
Arc'teryxRho LT Crew Neck Base Layer Top - Men's
$70.83 - $100.00Underwear Weight:LightweightSize Type:Regular, Big SmartwoolClassic Thermal Merino Colorblock Crew Base Layer Top - Men's
$59.83 - $120.00Size Type:Regular- New arrival
Arc'teryxRho Heavyweight Zip-Neck Base Layer Top - Men's
$112.73Save 19%compared to  $140.00Underwear Weight:HeavyweightSize Type:Regular, BigREI OUTLET REI Co-opMerino 185 Base Layer Top - Men's
$69.95Underwear Weight:LightweightSize Type:Regular, BigOrtovox120 Comp Light Base Layer Hoody - Men's
$120.00Underwear Weight:LightweightSize Type:Regular- Top Rated
SmartwoolClassic Thermal Merino Crew Base Layer Top - Men's
$86.73Save 24%compared to  $115.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET - Top Rated
SmartwoolClassic All Season Merino Long-Sleeve Base Layer Top - Men's
$67.73Save 24%compared to  $90.00Underwear Weight:LightweightSize Type:Regular, BigREI OUTLET - Top Rated
IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Men's
$78.73Save 25%compared to  $105.00Underwear Weight:LightweightSize Type:Regular, BigREI OUTLET Terramar1.0 All-Season Lightweight Merino Wool T-Shirt - Men's
$34.73Save 30%compared to  $50.00Underwear Weight:LightweightSize Type:RegularREI OUTLETHelly HansenLIFA Merino Midweight Balaclava Base Layer Hoodie - Men's
$104.73Save 30%compared to  $150.00Underwear Weight:MidweightSize Type:RegularREI OUTLETSmartwoolThermal Merino Base Layer Hoodie - Men's
$145.00Underwear Weight:MidweightSize Type:RegularSmartwoolIntraknit Active Base Layer Top - Men's
$110.00Underwear Weight:LightweightSize Type:Regular- Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Turtleneck Base Layer - Men's
$135.00Underwear Weight:MidweightSize Type:Big Ortovox120 Cool Tec Clean Base Layer T-Shirt - Men's
$90.00Underwear Weight:LightweightSize Type:Regular, BigArtilectFlatiron 185 Quarter-Zip Base Layer Top - Men's
$47.83Save 70%compared to  $160.00Underwear Weight:MidweightSize Type:Regular- Top Rated
ArtilectBoulder 125 Quarter-Zip Base Layer Top - Men's
$38.83Save 70%compared to  $130.00Underwear Weight:LightweightSize Type:Regular Helly HansenLIFA Merino Midweight Base Layer Hoodie - Men's
$120.00Underwear Weight:MidweightSize Type:RegularHelly HansenLifa Merino Midweight Half-Zip Base Layer Top - Men's
$110.00Underwear Weight:MidweightSize Type:RegularFree CountryMicrotech Heat Cocaber Base Layer Top - Men's
$26.73Save 33%compared to  $40.00Underwear Weight:LightweightSize Type:BigREI OUTLETFree CountryForce Grid Fleece Base Layer Top - Men's
$29.73Save 33%compared to  $45.00Underwear Weight:LightweightSize Type:BigREI OUTLETFree CountryMicrotech Heat Base Layer Top - Men's
$28.73Save 36%compared to  $45.00Underwear Weight:LightweightSize Type:BigREI OUTLET- Top Rated
Free CountryForce Grid Fleece Crew Base Layer Top - Men's
$31.73Save 29%compared to  $45.00Underwear Weight:LightweightSize Type:Big, RegularREI OUTLET - Top Rated
SmartwoolClassic Thermal Merino Base Layer Quarter-Zip - Men's
$89.73Save 25%compared to  $120.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET - Top Rated
CotopaxiLiso Base Layer Top - Men's
$48.73Save 25%compared to  $65.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET ArtilectGoldhill 125 Zoned Crew Base Layer Top - Men's
$89.73Save 30%compared to  $130.00Underwear Weight:LightweightSize Type:Regular, BigREI OUTLETIcebreakerMerino 200 Sonebula Long-Sleeve High-Neck Base Layer Top - Men's
$93.73Save 25%compared to  $125.00Underwear Weight:MidweightSize Type:RegularREI OUTLETSmartwoolIntraknit Thermal Merino Pattern Crew Base Layer Top - Men's
$90.73Save 30%compared to  $130.00Underwear Weight:LightweightSize Type:Regular, BigREI OUTLETArtilectFlatiron 185 Crew Base Layer Top - Men's
$96.73 - $109.73Save 30% - 31%compared to  $140.00 - $160.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET- Top Rated
Icebreaker200 ZoneKnit Long-Sleeve Crewe Base Layer Thermal Top - Men's
$109.73Save 26%compared to  $150.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET SmartwoolIntraknit Active Base Layer Crew Shirt - Men's
$81.73Save 25%compared to  $110.00Underwear Weight:MidweightSize Type:Big, RegularREI OUTLETIcebreakerMerino 260 Tech Long Sleeve Crewe Base Layer Top - Men's
$119.73Save 27%compared to  $165.00Underwear Weight:HeavyweightSize Type:Regular, BigREI OUTLETSmartwoolIntraknit Thermal Merino Crew Base Layer Top - Men's
$97.73Save 24%compared to  $130.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET- Top Rated
Arc'teryxRho LT Base Layer Hoody - Men's
$96.93Save 19%compared to  $120.00Underwear Weight:LightweightSize Type:Regular, Big - New arrival
SmartwoolIntraknit Thermal Merino Base Layer Colorblock Crew - Men's
$97.73Save 24%compared to  $130.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET - Top Rated
ArtilectDarkhorse 185 Zoned Crew Base Layer Top - Men's
$109.73Save 31%compared to  $160.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET - Top Rated
IcebreakerMerino 200 Sonebula Long-Sleeve Crewe Base Layer Top - Men's
$89.73Save 25%compared to  $120.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET Icebreaker125 ZoneKnit Crewe Base Layer Shirt - Men's
$86.73Save 24%compared to  $115.00Underwear Weight:LightweightSize Type:Regular, BigREI OUTLETSaxxRoast Master Midweight Long-Sleeve Crew Base Layer Top - Men's
$52.73Save 29%compared to  $75.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET- Top Rated
IcebreakerMerino 125 ZoneKnit Long-Sleeve Half-Zip Base Layer Top - Men's
$99.73Save 26%compared to  $135.00Underwear Weight:LightweightSize Type:Regular, BigREI OUTLET - Top Rated
Arc'teryxRho Merino Wool Crew Neck Base Layer Top - Men's
$84.83Save 29%compared to  $120.00Underwear Weight:MidweightSize Type:Big, Regular SmartwoolIntraknit Thermal Merino Colorblock Crew Base Layer Top - Men's
$64.83Save 50%compared to  $130.00Underwear Weight:LightweightSize Type:Regular- Top Rated
Arc'teryxRho Heavyweight Zip-Neck Base Layer Top - Men's
$98.83Save 29% - 34%compared to  $140.00 - $150.00Underwear Weight:HeavyweightSize Type:Big, Regular Arc'teryxRho Merino Wool Zip-Neck Base Layer Top - Men's
$98.83Save 29%compared to  $140.00Underwear Weight:MidweightSize Type:Regular, BigPicture Organic ClothingNangha Base Layer Top - Men's
$44.83Save 50%compared to  $90.00Underwear Weight:MidweightSize Type:Regular, Big
Sort: Best Match