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Lightweight Base Layer Tops
(89 products)Products (89)
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- REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men'sTop Rated$79.95Underwear Weight:LightweightSize Type:Regular, Big
- SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Men'sTop Rated$90.00Underwear Weight:LightweightSize Type:Regular, Big
- REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men'sTop Rated$89.95Underwear Weight:LightweightSize Type:Regular, Big
- tasc PerformanceElevation Merino T-Shirt - Men's$54.73Save 30%compared to  $79.00Underwear Weight:LightweightSize Type:Regular, BigREI OUTLET
- REI Co-opLightweight Long-Sleeve Crew Base Layer Top - Men's$27.93 - $39.95Underwear Weight:LightweightSize Type:Regular, Big, Tall
- tasc PerformanceElevation Merino T-Shirt - Women's$54.73Save 30%compared to  $79.00Underwear Weight:LightweightSize Type:Regular, PlusREI OUTLET
- SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Women's$90.00Underwear Weight:LightweightSize Type:Regular, Plus
- REI Co-opMerino 185 Long-Sleeve Base Layer Top - Women's$79.95Underwear Weight:LightweightSize Type:Regular
- Free CountryForce Grid Fleece Base Layer Top - Women's$34.73Save 36%compared to  $55.00Underwear Weight:LightweightSize Type:Regular, PlusREI OUTLET
- Arc'teryxRho LT Base Layer Hoody - Men'sTop Rated$120.00Underwear Weight:LightweightSize Type:Regular, Big
- Arc'teryxRho LT Crew Neck Base Layer Top - Men'sTop Rated$100.00Underwear Weight:LightweightSize Type:Big, Regular
- Arc'teryxRho Hoody Base Layer Top - Women'sTop Rated$120.00 - $140.00Underwear Weight:LightweightSize Type:Regular, Plus
- Free CountryForce Grid Fleece Base Layer Top - Men'sTop Rated$29.73Save 33%compared to  $45.00Underwear Weight:LightweightSize Type:Big, RegularREI OUTLET
- SmartwoolClassic All-Season Merino T-Shirt - Men's$80.00Underwear Weight:LightweightSize Type:Regular, Big
- Arc'teryxRho LT Zip-Neck Base Layer Top - Men'sTop Rated$120.00Underwear Weight:LightweightSize Type:Big, Regular
- Free CountryCloud Knit Crewneck Base Layer Top - Men's$26.73Save 33%compared to  $40.00Underwear Weight:LightweightSize Type:Regular, BigREI OUTLET
- Kari TraaFierce Long-Sleeve Base Layer Top - Women's$46.73Save 29%compared to  $66.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Women'sTop Rated$89.95Underwear Weight:LightweightSize Type:Regular
- REI Co-opLightweight Half-Zip Base Layer Top - Men'sTop Rated$44.95Underwear Weight:LightweightSize Type:Regular, Big
- Arms of Andes160 Ultralight Alpaca Wool Long-Sleeve Base Layer Shirt - Men's$90.00Underwear Weight:UltralightweightSize Type:Regular, Big
- REI Co-opLightweight Crew Base Layer Top - Men'sTop Rated$19.93 - $29.95Underwear Weight:LightweightSize Type:Regular, Big
- REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's Tall SizesTop Rated$89.95Underwear Weight:LightweightSize Type:Tall
- REI Co-opLightweight Long-Sleeve Crew Base Layer Top - Women'sTop Rated$27.93 - $39.95Underwear Weight:LightweightSize Type:Regular, Plus
- REI Co-opMerino 185 Base Layer Top - Men's$69.95Underwear Weight:LightweightSize Type:Regular, Big
- Arc'teryxRho Zip-Neck Base Layer Top - Women'sTop Rated$120.00Underwear Weight:LightweightSize Type:Regular, Plus
- SmartwoolClassic All-Season Merino T-Shirt - Women's$80.00Underwear Weight:LightweightSize Type:Regular, Plus
- Free CountryMicrotech Heat Cocarber Base Layer Top - Women's$39.73Save 33%compared to  $60.00Underwear Weight:LightweightSize Type:Regular, PlusREI OUTLET
- Kari TraaEloise Half-Zip Base Layer Top - Women's$59.73Save 25%compared to  $80.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Kari TraaAlma Hood Base Layer Top - Women's$59.73Save 25%compared to  $80.00Underwear Weight:UltralightweightSize Type:RegularREI OUTLET
- Kari TraaSmekker Half-Zip Base Layer Top - Women's$140.00Underwear Weight:LightweightSize Type:Regular
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