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Base Layer Tops
(284 products)Products (284)
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- SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Men's$92.73Save 28%compared to  $130.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- SaxxRoast Master Midweight Long-Sleeve Crew Base Layer Top - Men's$47.73Save 36%compared to  $75.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- Hot ChillysClima-Wool Crew Base Layer Top - Men's$79.73Save 33%compared to  $120.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Icebreaker125 ZoneKnit Merino Long-Sleeve Crewe Thermal Top - Men'sTop Rated$93.73Save 25%compared to  $125.00Underwear Weight:UltralightweightSize Type:Regular, BigREI OUTLET
- Icebreaker150 Anatomica Crewe Base Layer Top - Men'sTop Rated$75.00Underwear Weight:LightweightSize Type:Regular, Big
- SmartwoolIntraknit Thermal Merino Base Layer Colorblock Crew - Men's$96.73Save 25%compared to  $130.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- IcebreakerMerino 125 ZoneKnit Long-Sleeve Half-Zip Base Layer Top - Men'sTop Rated$99.73Save 26%compared to  $135.00Underwear Weight:LightweightSize Type:Regular, BigREI OUTLET
- Icebreaker125 ZoneKnit Crewe Base Layer Shirt - Men's$84.73Save 26%compared to  $115.00Underwear Weight:LightweightSize Type:Regular, BigREI OUTLET
- Picture Organic ClothingNangha Base Layer Top - Men's$44.83Save 50%compared to  $90.00Underwear Weight:MidweightSize Type:Regular
- ArtilectDarkhorse 185 Zoned Crew Base Layer Top - Men'sTop Rated$109.73Save 31%compared to  $160.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Arms of Andes160 Ultralight Alpaca Wool Crewneck Base Layer T-Shirt - Men's$80.00Underwear Weight:UltralightweightSize Type:Regular
- Ortovox230 Competition Long-Sleeve Base Layer Top - Men's$110.00Underwear Weight:MidweightSize Type:Regular, Big
- Icebreaker200 ZoneKnit Long-Sleeve Crewe Base Layer Thermal Top - Men'sTop Rated$109.73Save 26%compared to  $150.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- Outdoor ResearchAlpine Onset Merino 150 Crew Base Layer Top - Men's$99.00Underwear Weight:LightweightSize Type:Regular, Big
- REI Co-opLightweight Half-Zip Base Layer Top - Women'sTop Rated$44.95Underwear Weight:LightweightSize Type:Regular, Plus
- FjallravenBergtagen Merino 190 T-Shirt - Men's$100.00Underwear Weight:LightweightSize Type:Regular
- Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Top - Men'sTop Rated$125.00Underwear Weight:LightweightSize Type:Regular
- The North FaceSummit Series Pro 120 Crew Base Layer Top - Men'sTop Rated$90.00Underwear Weight:UltralightweightSize Type:Regular, Big
- Outdoor ResearchAlpine Onset Merino 150 Quarter-Zip Base Layer Top - Men's$109.00Underwear Weight:LightweightSize Type:Regular, Big
- Helly HansenLifa Merino Midweight Half-Zip Base Layer Top - Men'sTop Rated$110.00 - $115.00Underwear Weight:MidweightSize Type:Regular, Big
- Arms of Andes300 Alpaca Wool Long-Sleeve Crew Base Layer Top - Men's$130.00 - $140.00Underwear Weight:LightweightSize Type:Regular, Big
- SmartwoolClassic Thermal Merino Colorblock Crew Base Layer Top - Men's$130.00Size Type:Regular, Big
- SmartwoolIntraknit Thermal Max Merino Quarter-Zip Base Layer Top - Men's$155.00Underwear Weight:MidweightSize Type:Regular, Big
- ArtilectFlatiron 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
- REI Co-opMidweight Base Layer Crew Top - Kids'Top Rated$34.95Underwear Weight:MidweightSize Type:Regular
- StioBasis PeakWool Midweight Half-Zip Base Layer Top - Men's$159.00Underwear Weight:MidweightSize Type:Regular, Big
- SmartwoolIntraknit Thermal Merino Colorblock Crew Base Layer Top - Men's$130.00Underwear Weight:LightweightSize Type:Regular, Big
- Helly HansenLifa Merino Midweight Crew Base Layer Top - Men's$105.00Underwear Weight:MidweightSize Type:Regular, Big
- Ortovox185 Rock'N'Wool Long-Sleeve Base Layer Top - Men's$120.00 - $130.00Underwear Weight:LightweightSize Type:Regular, Big
- Icebreaker300 MerinoFine Polar Long-Sleeve Half-Zip Thermal Base Layer Top - Men'sNew arrival$250.00Underwear Weight:HeavyweightSize Type:Regular
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