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Base Layer Tops
(280 products)Products (280)
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- SmartwoolClassic Thermal Merino Crew Base Layer Top - Kids'Top Rated$65.00Underwear Weight:MidweightSize Type:Regular
- SmartwoolClassic Thermal Merino Half-Zip Base Layer Hoodie - Women's$145.00Size Type:Regular
- Kari TraaLune Long-Sleeve Base Layer Top - Women's$41.73Save 35%compared to  $65.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- Hot ChillysPeach Skins T-Neck Base Layer Top - Kids'$32.73Save 34%compared to  $50.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Kari TraaSaga Half-Zip Base Layer Top - Women's$135.00Underwear Weight:HeavyweightSize Type:Regular
- ColumbiaOmni-Heat Midweight Crew Base Layer Top - Kids'Top Rated$30.00Underwear Weight:MidweightSize Type:Regular
- IcebreakerMerino 200 ZoneKnit Long-Sleeve Half-Zip Thermal Base Layer Top - Women's$103.73Save 35%compared to  $160.00Members, use code OUTEARLY25 to save more, today only!Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Arms of Andes160 Ultralight Alpaca Wool Crew Neck Base Layer T-Shirt - Women's$75.00Underwear Weight:UltralightweightSize Type:Regular
- Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Thermal Top - Women's$93.73Save 25%compared to  $125.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- SmartwoolClassic Thermal Merino Mock Neck Base Layer Top - Women's$140.00Underwear Weight:MidweightSize Type:Regular
- Helly HansenLIFA Merino Midweight Half-Zip Base Layer Top - Women's$82.73Save 24%compared to  $110.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Helly HansenLifa Merino Midweight Graphic Base Layer Top - Women'sTop Rated$79.73 - $82.73Save 24% - 27%compared to  $110.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Kari TraaSmekker Half-Zip Base Layer Top - Women's$140.00Underwear Weight:LightweightSize Type:Regular
- Kari TraaAlma Half-Zip Base Layer Top - Women's$59.73Save 25%compared to  $80.00Underwear Weight:UltralightweightSize Type:RegularREI OUTLET
- IcebreakerSiren Sweetheart Long Underwear Top - Women's$85.00Underwear Weight:LightweightSize Type:Regular
- Terramar1.0 All-Season Lightweight Merino Wool T-Shirt - Women's$34.73Save 30%compared to  $50.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Icebreaker200 Oasis Crewe Long-Sleeve Base Layer Top - Kids'Top Rated$60.00Underwear Weight:MidweightSize Type:Regular
- Wild RyeEvie Raglan Base Layer Top - Women's$69.73Save 41%compared to  $119.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- The North FaceSummit Series Pro 120 Crew Base Layer Top - Women'sTop Rated$90.00Underwear Weight:UltralightweightSize Type:Regular, Plus
- ArtilectBoulder 125 Crew Long-Sleeve Base Layer Top - Women's$75.73Save 36%compared to  $120.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Helly HansenLIFA Merino Midweight 2-in-1 Graphic Half-Zip Base Layer Top - Women's$125.00Underwear Weight:MidweightSize Type:Regular
- Kari TraaVoss Cashmere Mix Half-Zip Base Layer Top - Women's$116.73Save 35%compared to  $180.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- PatagoniaCapilene Thermal Weight Long Underwear Crew Top - Women's$99.00Underwear Weight:HeavyweightSize Type:Regular
- CraftCore Dry Active Comfort Long-Sleeve Base Layer Jersey - Kids'$38.73Save 40%compared to  $64.95Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Kari TraaEmbla Wool Long-Sleeve Base Layer Top - Women's$90.00Underwear Weight:UltralightweightSize Type:Regular
- Icebreaker260 Tech Vertex Long-Sleeve Half-Zip Thermal Base Layer Top - Women'sNew arrival$150.00Underwear Weight:HeavyweightSize Type:Regular
- IcebreakerMerino 200 Oasis Long-Sleeve Crewe Macro Forms Base Layer Top - Women's$85.73Save 25%compared to  $115.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Wild RyeBassett Half-Zip Base Layer Top - Women's$135.00Underwear Weight:MidweightSize Type:Regular, Plus
- KUHLReactiv Lite Grid Quarter-Zip Base Layer Top - Women's$119.00Underwear Weight:LightweightSize Type:Regular
- HalfdaysFay Midweight Merino Base Layer Top - Women'sTop Rated$130.00Underwear Weight:MidweightSize Type:Regular
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