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Long Sleeve Underwear
(182 products)Products (182)
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- NRSExpedition Weight Union Suit - Women's$169.95Underwear Weight:HeavyweightSize Type:Regular
- Helly HansenLifa Merino Midweight Crew Base Layer Top - Men's$105.00Underwear Weight:MidweightSize Type:Regular
- Deux par DeuxThermal Underwear Base Layer Set - Kids'$35.83Save 50%compared to $72.00Underwear Weight:MidweightSize Type:Regular
- NRSExpedition Weight Union Suit - Men's$169.95Underwear Weight:HeavyweightSize Type:Regular, Big
- Helly HansenGraphic Lifa Merino Base Layer Set - Kids'$93.73Save 25%compared to $125.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET
- Helly HansenLIFA Merino Midweight Balaclava Base Layer Hoodie - Women's$150.00 - $155.00Underwear Weight:MidweightSize Type:Regular
- Wild RyeBassett LITE Raglan Base Layer Top - Women's$48.83Save 50%compared to $99.00Underwear Weight:LightweightSize Type:Regular, Plus
- SmartwoolClassic All-Season Merino Quarter-Zip Base Layer Top - Women'sTop Rated$105.00Size Type:Regular
- Kari TraaLucie Half-Zip Base Layer Top - Women's$66.73Save 25%compared to $90.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- ObermeyerComfy Cozy Cargo Base-Layer Set - Kids'$45.73Save 33%compared to $69.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Helly HansenHH LIFA Crew Base Layer Top - Women's$50.00Underwear Weight:LightweightSize Type:Regular
- SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Women's$96.73Save 25%compared to $130.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Kari TraaAnna Half-Zip Base Layer Top - Women's$59.83 - $120.00Underwear Weight:MidweightSize Type:Regular
- ObermeyerComfy Cozy Base Layer Set - Kids'$42.73Save 27%compared to $59.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- SENIQWool Sculpt Merino Mock-Neck Long-Sleeve Base Layer Shirt - Women's$99.93 - $128.00Underwear Weight:HeavyweightSize Type:Regular
- Helly HansenHH Durawool Crew Long-Sleeve Shirt - Women's$59.73Save 33%compared to $90.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- StioBasis PeakWool Midweight Half-Zip Base Layer Top - Men'sTop Rated$159.00Add to cart to see priceUnderwear Weight:MidweightSize Type:Regular
- Helly HansenLifa Merino Midweight Base Layer Half-Zip Top - Women's$110.00Underwear Weight:MidweightSize Type:Regular
- HalfdaysJohnson Base Layer Top - Women's$46.83Save 50%compared to $95.00Underwear Weight:UltralightweightSize Type:Regular
- SmartwoolClassic All-Season Merino Quarter-Zip Base Layer Top - Men'sTop Rated$105.00Underwear Weight:MidweightSize Type:Regular, Big
- NRSH2Core Lightweight Union Suit - Men's$109.95Underwear Weight:MidweightSize Type:Regular, Big
- HalfdaysFay Midweight Merino Base Layer Top - Women's$64.83 - $130.00Underwear Weight:MidweightSize Type:Regular
- RHONEApres Houndstooth Quarter-Zip Base Layer Top - Women's$102.93Save 30%compared to $148.00Underwear Weight:LightweightSize Type:Regular
- Free CountryCloud Knit Crewneck Base Layer Top - Men's$26.73Save 33%compared to $40.00Underwear Weight:LightweightSize Type:Regular, BigREI OUTLET
- Kari TraaSmekker Half-Zip Base Layer Top - Women's$89.73Save 30%compared to $130.00Underwear Weight:LightweightSize 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
- Wild RyeBassett Half-Zip Base Layer Top - Women's$66.83Save 50%compared to $135.00Underwear Weight:MidweightSize Type:Regular
- Kari TraaFierce Long-Sleeve Base Layer Top - Women's$46.73Save 29%compared to $66.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Kari TraaAnna Long-Sleeve Base Layer Top - Women's$54.83Save 50%compared to $110.00Underwear Weight:MidweightSize Type:Regular
- Hot ChillysOriginals Print Base Layer Crew - Kids'$39.73Save 27%compared to $55.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
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