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Women's Base Layer Tops
(144 products)Products (144)
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- REI Co-opHeavyweight Merino Long-Sleeve Base Layer Crew Top - Women'sTop Rated$99.95Underwear Weight:HeavyweightSize Type:Regular, Plus
- CraftCORE Dry Active Comfort Base Layer Top - Women's$39.73Save 38%compared to  $64.95Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:MidweightSize Type:RegularREI OUTLET
- IcebreakerMerino 200 Oasis Long-Sleeve Half-Zip Thermal Base Layer Top - Women'sTop Rated$84.73Save 26%compared to  $115.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:MidweightSize Type:Regular, PlusREI OUTLET
- Black DiamondSolution 150 Merino Base Layer Crew Top - Women'sTop Rated$99.73Save 26%compared to  $135.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:LightweightSize Type:RegularREI OUTLET
- Free CountryMicrotech Heat Cocaber Base Layer Top - Women's$34.73Save 30%compared to  $50.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:LightweightSize Type:RegularREI OUTLET
- IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Thermal Base Layer Top - Women'sTop Rated$99.73Save 26%compared to  $135.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:HeavyweightSize Type:Regular, PlusREI OUTLET
- Helly HansenLIFA Merino Midweight Crew Base Layer Top - Women's$69.73Save 30%compared to  $100.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:MidweightSize Type:Regular, PlusREI OUTLET
- Kari TraaLucie Half-Zip Base Layer Top - Women's$67.73Save 24%compared to  $90.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:LightweightSize Type:RegularREI OUTLET
- PatagoniaCapilene Midweight Zip-Neck Base Layer Top - Women's$99.00Underwear Weight:MidweightSize Type:Regular
- REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Women's Plus Sizes$29.83 - $89.95Underwear Weight:LightweightSize Type:Plus
- tasc PerformanceElevation Merino T-Shirt - Women's$49.73Save 37%compared to  $79.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:LightweightSize Type:Regular, PlusREI OUTLET
- Kari TraaAlma Half-Zip Base Layer Top - Women's$59.73Save 25%compared to  $80.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:UltralightweightSize Type:RegularREI OUTLET
- REI Co-opHeavyweight Merino Base Layer Half-Zip Top - Women'sTop Rated$104.95Underwear Weight:HeavyweightSize Type:Regular, Plus
- Terramar3.0 Thermawool Crew Base Layer Top - Women's$49.73 - $52.73Save 24% - 28%compared to  $70.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:MidweightSize Type:RegularREI OUTLET
- SmartwoolIntraknit Thermal Merino Pattern Crew Base Layer Top - Women's$96.73Save 25%compared to  $130.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:MidweightSize Type:RegularREI OUTLET
- Kari TraaSmekker Long-Sleeve Base Layer Top - Women's$89.73Save 25%compared to  $120.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:LightweightSize Type:RegularREI OUTLET
- SmartwoolClassic All-Season Merino Quarter-Zip Base Layer Top - Women's$95.00Size Type:Regular
- PatagoniaCapilene Thermal Weight Zip-Neck Long Underwear Top - Women's$109.00Underwear Weight:HeavyweightSize Type:Regular
- Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Thermal Top - Women's$93.73Save 25%compared to  $125.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:LightweightSize Type:RegularREI OUTLET
- KUHLReactiv Lite Grid Quarter-Zip Base Layer Top - Women's$119.00Underwear Weight:LightweightSize Type:Regular
- Free CountryForce Grid Fleece Base Layer Top - Women's$34.73Save 36%compared to  $55.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:LightweightSize Type:RegularREI OUTLET
- Kari TraaRose Half-Zip Base Layer Top - Women'sTop Rated$89.73Save 25%compared to  $120.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:HeavyweightSize Type:Regular, PlusREI OUTLET
- Outdoor ResearchAlpine Onset Merino 150 Base Layer Hoodie - Women'sTop Rated$119.00Underwear Weight:LightweightSize Type:Regular, Plus
- Kari TraaAlma Hood Base Layer Top - Women's$59.73Save 25%compared to  $80.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:UltralightweightSize Type:RegularREI OUTLET
- SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Women's$130.00Underwear Weight:MidweightSize Type:Regular
- SmartwoolIntraknit Thermal Max Merino Base Layer Pattern Hoodie - Women's$114.73Save 30%compared to  $165.00Members use code LABORDAY2025 for an extra 20% off at REI OutletSize Type:RegularREI OUTLET
- SpraywayEffra Crew Base Layer Top - Women's$36.73Save 26%compared to  $49.95Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:HeavyweightSize Type:Regular, PlusREI OUTLET
- SmartwoolIntraknit Thermal Merino Colorblock Quarter-Zip Base Layer Top - Women's$140.00Underwear Weight:MidweightSize Type:Regular
- Terramar3.0 Thermawool Half-Zip Base Layer Top - Women's$56.73Save 24%compared to  $75.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:MidweightSize Type:RegularREI OUTLET
- Terramar2.0 Cloud Nine Midweight Performance Base Layer Scoop Shirt - Women's$29.73Save 33%compared to  $45.00Members use code LABORDAY2025 for an extra 20% off at REI OutletUnderwear Weight:MidweightSize Type:RegularREI OUTLET
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