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Lightweight Base Layer Tops
(89 products)Products (89)
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- REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Women's Plus Sizes$89.95Underwear Weight:LightweightSize Type:Plus
- Arms of Andes160 Ultralight Alpaca Wool Long-Sleeve Base Layer Shirt - Women's$85.00 - $100.00Underwear Weight:UltralightweightSize Type:Regular
- Kari TraaAlma T-Shirt - Women'sNew arrival$80.00Underwear Weight:LightweightSize Type:Regular
- Arms of Andes300 Lightweight Alpaca Wool Half-Zip Base Layer Top - Men's$145.00Underwear Weight:LightweightSize Type:Regular, Big
- Kari TraaAlma Half-Zip Base Layer Top - Women's$59.73Save 25%compared to  $80.00Underwear Weight:UltralightweightSize Type:RegularREI OUTLET
- Terramar2.0 Thermolator Crew Base Layer Top - Kids'$24.73Save 29%compared to  $35.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Icebreaker125 ZoneKnit Crewe Base Layer Shirt - Men's$84.73Save 26%compared to  $115.00Underwear Weight:LightweightSize Type:Regular, BigREI OUTLET
- Kari TraaFryd Long-Sleeve Base Layer Top - Women's$40.73Save 32%compared to  $60.00Underwear Weight:LightweightSize Type:Regular, PlusREI OUTLET
- Kari TraaFryd Half-Zip Base Layer Top - Women's$48.73Save 26%compared to  $66.00Underwear Weight:LightweightSize Type:Regular, PlusREI OUTLET
- Wild RyeBassett LITE Raglan Base Layer Top - Women's$99.00Underwear Weight:LightweightSize Type:Regular, Plus
- RHONEApres Houndstooth Quarter-Zip Base Layer Top - Women's$148.00Underwear Weight:LightweightSize Type:Regular
- Ortovox185 Rock'N'Wool Long-Sleeve Base Layer Top - Men's$120.00 - $130.00Underwear Weight:LightweightSize Type:Regular, Big
- Outdoor ResearchAlpine Onset Merino 150 Half-Zip Base Layer Top - Women's$109.00Underwear Weight:LightweightSize Type:Regular
- Outdoor ResearchAlpine Onset Merino 150 Crew Base Layer Top - Women's$99.00Underwear Weight:LightweightSize Type:Regular, Plus
- REI Co-opMerino 185 Base Layer Top - Women's Plus Sizes$69.95Underwear Weight:LightweightSize Type:Plus
- Ortovox185 Rock'N'Wool Zip Neck Base Layer Top - Men's$130.00Underwear Weight:LightweightSize Type:Regular, Big
- KUHLReactiv Lite Grid Quarter-Zip Base Layer Top - Women's$119.00Underwear Weight:LightweightSize Type:Regular
- Icebreaker125 ZoneKnit Crewe Base Layer Shirt - Women's$84.73Save 26%compared to  $115.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Arms of Andes300 Lightweight Alpaca Wool Pullover Base Layer Hoodie - Women's$140.00Underwear Weight:LightweightSize Type:Regular
- Arms of Andes300 Lightweight Alpaca Wool Half-Zip Base Layer Top - Women's$115.00 - $135.00Underwear Weight:LightweightSize Type:Regular
- Outdoor ResearchAlpine Onset Merino 150 Base Layer Hoodie - Men'sTop Rated$119.00Underwear Weight:LightweightSize Type:Regular
- Helly HansenLIFA ACTIVE Graphic Crew Base Layer Top - Women's$42.73Save 34%compared to  $65.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Outdoor ResearchAlpine Onset Merino 150 Base Layer Hoodie - Women'sTop Rated$119.00Underwear Weight:LightweightSize Type:Regular, Plus
- Free CountryMicrotech Heat Cocarber Base Layer Top - Women's$34.73Save 30%compared to  $50.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Hot ChillysPeach Skins T-Neck Base Layer Top - Kids'$32.73Save 34%compared to  $50.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Ortovox120 Comp Light Base Layer Hoody - Men's$120.00Underwear Weight:LightweightSize Type:Regular, Big
- Icebreaker125 Cool-Lite Merino Blend Sphere III Scoop T-Shirt - Women's$75.00Underwear Weight:LightweightSize Type:Regular
- ArtilectBoulder 125 Crew Long-Sleeve Base Layer Top - Women's$65.73Save 45%compared to  $120.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Arms of Andes160 Ultralight Alpaca Wool Crew Neck Base Layer T-Shirt - Women's$75.00Underwear Weight:UltralightweightSize Type:Regular
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