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Women's Base Layer Tops
(108 products)Products (108)
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- SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Women's$49.83 - $100.00Underwear Weight:LightweightSize Type:Regular, Plus
- REI Co-opLightweight Long-Sleeve Crew Base Layer Top - Women'sTop Rated$44.95Underwear Weight:LightweightSize Type:Regular, Plus
- SmartwoolClassic Thermal Merino Crew Base Layer Top - Women'sTop Rated$125.00Underwear Weight:MidweightSize Type:Regular, Plus
- REI Co-opMidweight Long-Sleeve Base Layer Top - Women's$54.95Underwear Weight:MidweightSize Type:Regular, Plus
- REI Co-opHeavyweight Merino Base Layer Half-Zip Top - Women'sTop Rated$29.83 - $104.95Underwear Weight:HeavyweightSize Type:Regular, Plus
- REI Co-opMerino 185 Long-Sleeve Base Layer Top - Women's$79.95Underwear Weight:LightweightSize Type:Regular
- SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Women's$49.83 - $150.00Underwear Weight:MidweightSize Type:Regular
- REI Co-opLightweight Half-Zip Base Layer Top - Women'sTop Rated$49.95Underwear Weight:LightweightSize Type:Regular, Plus
- REI Co-opMidweight Base Layer Half-Zip Top - Women's$59.95Underwear Weight:MidweightSize Type:Regular, Plus
- SmartwoolClassic All-Season Merino T-Shirt - Women's$95.00Underwear Weight:LightweightSize Type:Regular, Plus
- IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Women'sTop Rated$120.00Underwear Weight:MidweightSize Type:Regular, Plus
- REI Co-opMerino 185 Base Layer Top - Women's$69.95Underwear Weight:LightweightSize Type:Regular
- REI Co-opLightweight Crew Base Layer Top - Women'sTop Rated$34.95Underwear Weight:LightweightSize Type:Regular, Plus
- tasc PerformanceElevation Merino T-Shirt - Women's$46.73Save 40%compared to $79.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Women'sTop Rated$89.93 - $130.00Underwear Weight:MidweightSize Type:Regular, Plus
- Arc'teryxSatoro Merino Wool Crew Neck Long-Sleeve Base Layer Top - Women'sTop Rated$95.73Save 20%compared to $120.00Underwear Weight:LightweightSize Type:Regular, PlusREI OUTLET
- Arc'teryxKyanite Base Layer Crew Top - Women's$95.73Save 20%compared to $120.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- SmartwoolClassic All-Season Merino Quarter-Zip Base Layer Top - Women's$69.73Save 26%compared to $95.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- SmartwoolClassic Thermal Merino Crew Base Layer Top - Women'sTop Rated$81.73 - $84.73Save 26% - 28%compared to $115.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Icebreaker125 Cool-Lite Merino Blend Sphere III Scoop T-Shirt - Women's$90.00Underwear Weight:LightweightSize Type:Regular
- SmartwoolIntraknit Thermal Merino Colorblock Quarter-Zip Base Layer Top - Women's$49.83 - $140.00Underwear Weight:MidweightSize Type:Regular
- REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Women'sTop Rated$89.95Underwear Weight:LightweightSize Type:Regular
- PatagoniaCapilene Midweight Crew Base Layer Top - Women'sTop Rated$52.83Save 40%compared to $89.00Underwear Weight:MidweightSize Type:Regular, Plus
- Arc'teryxRho Zip-Neck Base Layer Top - Women'sTop Rated$90.93 - $96.93Save 19% - 24%compared to $120.00Underwear Weight:LightweightSize Type:Regular, Plus
- SmartwoolClassic Thermal Merino Base Layer Quarter-Zip - Women'sTop Rated$89.73Save 25%compared to $120.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- PatagoniaCapilene Midweight Zip-Neck Base Layer Top - Women's$58.83Save 40%compared to $99.00Underwear Weight:MidweightSize Type:Regular
- REI Co-opHeavyweight Merino Long-Sleeve Base Layer Crew Top - Women's$99.95Underwear Weight:HeavyweightSize Type:Regular, Plus
- SmartwoolClassic Thermal Merino Half-Zip Base Layer Hoodie - Women's$108.73Save 25%compared to $145.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Kari TraaLilja Half-Zip Base Layer Top - Women'sNew arrival$58.73Save 30%compared to $85.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- Icebreaker200 Oasis Long-Sleeve Half-Zip Base Layer Top - Women'sTop Rated$115.00 - $130.00Underwear Weight:LightweightSize Type:Regular, Plus
- SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Women's$96.73Save 25%compared to $130.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- SmartwoolClassic All-Season Merino Quarter-Zip Base Layer Top - Women's$105.00Size Type:Regular
- Kari TraaEdith Half-Zip Base Layer Top - Women'sTop Rated$81.73Save 25%compared to $110.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- PatagoniaCapilene Midweight Zip-Neck Base Layer Top - Women's$63.73Save 35%compared to $99.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Kari TraaSaga Hooded Base Layer Top - Women'sNew arrival$109.73Save 24%compared to $145.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- Black DiamondSolution 150 Merino Base Layer Crew Top - Women'sTop Rated$99.73Save 26%compared to $135.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- PatagoniaCapilene Thermal Weight Long Underwear Crew Top - Women's$58.83Save 40%compared to $99.00Underwear Weight:HeavyweightSize Type:Regular
- Kari TraaRose Half-Zip Base Layer Top - Women'sTop Rated$106.73Save 23%compared to $140.00Underwear Weight:HeavyweightSize Type:Regular, PlusREI OUTLET
- SENIQWool Sculpt Merino Mock-Neck Long-Sleeve Base Layer Shirt - Women's$63.83 - $128.00Underwear Weight:HeavyweightSize Type:Regular
- Icebreaker260 Tech Long-Sleeve Crewe Base Layer Top - Women'sTop Rated$125.00 - $140.00Underwear Weight:HeavyweightSize Type:Regular, Plus
- Kari TraaRose Half-Zip Base Layer Top - Women'sTop Rated$140.00Underwear Weight:MidweightSize Type:Regular
- IcebreakerMerino 200 Oasis Long-Sleeve Crewe Base Layer Top - Women's$120.00Underwear Weight:MidweightSize Type:Regular
- SmartwoolIntraknit AS Merino Base Layer Crew Top - Women's$125.00Underwear Weight:MidweightSize Type:Regular
- Kari TraaFryd Long-Sleeve Base Layer Top - Women's$49.73Save 23%compared to $65.00Underwear Weight:LightweightSize Type:Plus, RegularREI OUTLET
- Helly HansenHH Durawool Base Layer T-Shirt - Women's$56.73Save 29%compared to $80.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Arc'teryxRho Base Layer Hoody - Women'sTop Rated$95.73Save 20%compared to $120.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Kari TraaEmbla Wool Long-Sleeve Base Layer Top - Women's$90.00Underwear Weight:UltralightweightSize Type:Regular
- Kari TraaMalia Long-Sleeve Base Layer Top - Women's$68.73Save 23%compared to $90.00Underwear Weight:MidweightSize Type:Regular, PlusREI OUTLET
- Arc'teryxRho Hoody Base Layer Top - Women'sTop Rated$69.83Save 50%compared to $140.00Underwear Weight:LightweightSize Type:Regular
- Kari TraaFierce Long-Sleeve Base Layer Top - Women's$45.73Save 30%compared to $66.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Arc'teryxLana Merino Wool Crew Base Layer Top - Women's$90.00Underwear Weight:LightweightSize Type:Regular
- Kari TraaAnna Half-Zip Base Layer Top - Women's$120.00Underwear Weight:MidweightSize Type:Regular
- PatagoniaCapilene Thermal Weight Zip-Neck Long Underwear Top - Women's$68.83Save 40%compared to $115.00Underwear Weight:HeavyweightSize Type:Regular
- Icebreaker125 ZoneKnit Crewe Base Layer Shirt - Women's$84.73Save 26%compared to $115.00Underwear Weight:LightweightSize 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
- PatagoniaCapilene Thermal Weight Zip-Neck Base Layer Top - Women's$69.73Save 36%compared to $109.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- Kari TraaRose Long-Sleeve Base Layer Top - Women's$76.73Save 30%compared to $110.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- Arc'teryxLana Merino Wool Base Layer Tank Top - Women's$80.00Underwear Weight:LightweightSize Type:Regular
- SmartwoolClassic Thermal Merino Mock Neck Base Layer Top - Women's$104.73Save 25%compared to $140.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Helly HansenHH Durawool Crew Long-Sleeve Shirt - Women's$59.73Save 33%compared to $90.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Helly HansenLIFA Merino Midweight Graphic Crew Base Layer - Women's$85.73Save 25%compared to $115.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- SmartwoolIntraknit Thermal Max Merino Quarter-Zip Base Layer Top - Women's$115.73Save 25%compared to $155.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- Terramar1.0 All-Season Lightweight Merino Wool T-Shirt - Women's$34.73Save 30%compared to $50.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Helly HansenLIFA Merino Midweight 2-In-1 Graphic Half-Zip Base Layer Top - Women's$93.73Save 25%compared to $125.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Kari TraaAlma Half-Zip Base Layer Top - Women's$100.00Underwear Weight:UltralightweightSize Type:Regular
- IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Base Layer Top - Women'sTop Rated$150.00Underwear Weight:MidweightSize Type:Regular, Plus
- Kari TraaLekker Long-Sleeve Base Layer Top - Women'sNew arrival$44.73Save 31%compared to $65.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Kari TraaSmekker Half-Zip Base Layer Top - Women's$140.00Underwear Weight:LightweightSize Type:Regular
- Kari TraaLilja Long-Sleeve Base Layer Top - Women's$56.73Save 24%compared to $75.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Thermal Base Layer Top - Women'sTop Rated$89.73Save 33%compared to $135.00Underwear Weight:HeavyweightSize Type:Plus, RegularREI OUTLET
- Kari TraaIselin Long-Sleeve Base Layer Top - Women'sNew arrival$44.73Save 31%compared to $65.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- HalfdaysFay Midweight Merino Base Layer Top - Women's$130.00Underwear Weight:MidweightSize Type:Regular
- SpraywayEffra Hoody Base Layer Top - Women's$49.73Save 28%compared to $69.95Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- ArtilectDarkhorse 185 Zoned Crew Base Layer Top - Women's$81.73Save 48%compared to $160.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Kari TraaEmbla Wool Base Layer T-Shirt - Women's$80.00Underwear Weight:UltralightweightSize Type:Regular
- Helly HansenHH LIFA Crew Base Layer Top - Women's$50.00Underwear Weight:LightweightSize 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
- Kari TraaTale Half-Zip Base Layer Top - Women'sNew arrival$89.73Save 25%compared to $120.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- SmartwoolClassic Thermal Merino Base Layer Crew One-Piece - Women's$250.00Underwear Weight:MidweightSize Type:Regular
- IcebreakerMerino 200 Oasis Long-Sleeve Half-Zip Thermal Base Layer Top - Women'sTop Rated$84.73Save 26%compared to $115.00Underwear Weight:MidweightSize Type:PlusREI OUTLET
- Kari TraaAnna Half-Zip Base Layer Top - Women'sNew arrival$89.73Save 25%compared to $120.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Kari TraaAlma T-Shirt - Women's$80.00Underwear Weight:LightweightSize Type:Regular
- IcebreakerSiren Sweetheart Long Underwear Top - Women's$85.00Underwear Weight:LightweightSize Type:Regular
- Black DiamondSolution 150 Quarter-Zip Hoody - Women's$99.73Save 31%compared to $145.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Kari TraaLucie Half-Zip Base Layer Top - Women's$66.73Save 25%compared to $90.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- SpraywayEffra Crew Base Layer Top - Women's$36.73Save 26%compared to $49.95Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- Helly HansenLIFA Merino Midweight Graphic Base Layer Crew Top - Women's$110.00 - $115.00Underwear Weight:MidweightSize Type:Regular
- Kari TraaSmekker Half-Zip Base Layer Top - Women's$89.73Save 30%compared to $130.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Icebreaker260 ZoneKnit Long-Sleeve Crewe Base Layer Top - Women'sTop Rated$119.73Save 27%compared to $165.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Kari TraaMalia Half-Zip Base Layer Top - Women's$76.73Save 23%compared to $100.00Underwear Weight:MidweightSize Type:Regular, PlusREI OUTLET
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