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Long Sleeve Base Layer Tops
(182 products)Products (182)
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- Helly HansenVerglas Half-Zip Top - Women's$63.73Save 25%compared to  $85.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- Helly HansenLIFA Merino Midweight Balaclava Base Layer Hoodie - Women's$104.73Save 30%compared to  $150.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- IcebreakerMerino 200 Sonebula Long-Sleeve Crewe Base Layer Top - Men'sTop Rated$89.73Save 25%compared to  $120.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- Arc'teryxKyanite Base Layer Crew Top - Women's$72.83Save 39%compared to  $120.00Underwear Weight:HeavyweightSize Type:Regular
- Helly HansenLIFA Merino Midweight Half-Zip Base Layer Top - Women's$82.73Save 24%compared to  $110.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- Sale Ends TodayIcebreakerMerino 260 Tech Long Sleeve Crewe Base Layer Top - Men'sTop Rated$109.73Save 33%compared to  $165.00Underwear Weight:HeavyweightSize Type:Regular, BigREI OUTLET
- Helly HansenLIFA ACTIVE Graphic Crew Base Layer Top - Women's$46.73Save 28%compared to  $65.00Underwear Weight:LightweightSize Type:RegularREI OUTLET
- ArtilectDarkhorse 185 Zoned Quarter-Zip Base Layer Top - Women's$116.73Save 31%compared to  $170.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- SmartwoolIntraknit Thermal Merino Base Layer Colorblock Crew - Men's$96.73Save 25%compared to  $130.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Men's$92.73Save 28%compared to  $130.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- SpraywayEffra Hoody Base Layer Top - Women's$49.73Save 28%compared to  $69.95Underwear Weight:HeavyweightSize Type:Regular, PlusREI OUTLET
- SaxxRoast Master Midweight Long-Sleeve Crew Base Layer Top - Men's$52.73Save 29%compared to  $75.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET
- SpraywayEffra Crew Base Layer Top - Women's$36.73Save 26%compared to  $49.95Underwear Weight:HeavyweightSize Type:Regular, PlusREI OUTLET
- IcebreakerMerino 200 ZoneKnit Long-Sleeve Half-Zip Thermal Base Layer Top - Women's$119.73Save 25%compared to  $160.00Underwear Weight:MidweightSize Type:RegularREI OUTLET
- BurtonMidweight X Base Layer Long Neck Hoodie - Women'sTop Rated$44.83Save 50%compared to  $89.95Underwear Weight:MidweightSize Type:Regular
- Arc'teryxRho Merino Wool Crew Neck Base Layer Top - Men'sTop Rated$84.83Save 29%compared to  $120.00Underwear Weight:MidweightSize Type:Big, Regular
- Kari TraaFaith Half-Zip Base Layer Top - Women's$59.83Save 50%compared to  $120.00Underwear Weight:HeavyweightSize Type:Regular
- SeirusHeatwave Body Mapped Quarter-Zip Long-Sleeve Base Layer Top - Women's$69.83Save 50%compared to  $140.00Underwear Weight:MidweightSize Type:Regular
- SmartwoolIntraknit Thermal Merino Colorblock Crew Base Layer Top - Men's$64.83Save 50%compared to  $130.00Underwear Weight:LightweightSize Type:Regular
- SmartwoolIntraknit Thermal Merino Colorblock Quarter-Zip Base Layer Top - Women's$97.93Save 30%compared to  $140.00Underwear Weight:MidweightSize Type:Regular
- Arc'teryxRho Heavyweight Zip-Neck Base Layer Top - Men'sTop Rated$98.83Save 29%compared to  $140.00Underwear Weight:HeavyweightSize Type:Regular, Big
- BurtonMidweight Base Layer Crew Top - Women's$31.83Save 50%compared to  $64.95Underwear Weight:MidweightSize Type:Regular
- HalfdaysJohnson Base Layer Top - Women's$62.93Save 25%compared to  $85.00Underwear Weight:UltralightweightSize Type:Regular, Plus
- Kari TraaSara Half-Zip Base Layer Top - Women's$54.83Save 50%compared to  $110.00Underwear Weight:HeavyweightSize Type:Regular
- Icebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Top - Women's$61.83Save 50%compared to  $125.00Underwear Weight:LightweightSize Type:Regular
- Arc'teryxRho Hoody Base Layer Top - Women'sTop Rated$104.93Save 19%compared to  $130.00Underwear Weight:LightweightSize Type:Regular
- Arc'teryxRho Merino Wool Zip-Neck Base Layer Top - Men's$98.83Save 29%compared to  $140.00Underwear Weight:MidweightSize Type:Regular, Big
- SeirusHeatwave All Season Reversible Long-Sleeve Base Layer Top - Women's$36.83Save 50%compared to  $75.00Underwear Weight:LightweightSize Type:Regular
- PatagoniaCapilene Midweight Crew Base Layer Top - Kids'$26.93Save 30%compared to  $39.00Underwear Weight:MidweightSize Type:Regular
- Wild RyeEvie Raglan Base Layer Top - Women'sTop Rated$61.83Save 50%compared to  $125.00Underwear Weight:LightweightSize Type:Regular, Plus
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