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Long Sleeve Underwear
(242 products)Products (242)
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SmartwoolClassic Thermal Merino Crew Base Layer Top - Women's
$86.73Save 24%compared to  $115.00Underwear Weight:MidweightSize Type:Regular, PlusREI OUTLET IcebreakerMerino 260 Vertex Long-Sleeve Crewe Thermal Base Layer Top - Women's
$99.73Save 28%compared to  $140.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET- New arrival
Kari TraaLilja Long-Sleeve Base Layer Top - Women's
$49.73Save 24%compared to  $66.00Underwear Weight:HeavyweightSize Type:RegularREI OUTLET - Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Thermal Base Layer Top - Men's
$99.73Save 26%compared to  $135.00Underwear Weight:HeavyweightSize Type:Regular, BigREI OUTLET - New arrival
Kari TraaAlma Hood Base Layer Top - Women's
$59.73Save 25%compared to  $80.00Underwear Weight:UltralightweightSize Type:RegularREI OUTLET CraftCore Dry Active Comfort Long-Sleeve Base Layer Jersey - Kids'
$42.73Save 34%compared to  $64.95Underwear Weight:MidweightSize Type:RegularREI OUTLETSmartwoolIntraknit Thermal Merino Pattern Crew Base Layer Top - Women's
$97.73Save 24%compared to  $130.00Underwear Weight:MidweightSize Type:RegularREI OUTLET- New arrival
Kari TraaMina Long-Sleeve Base Layer Top - Women's
$44.73Save 25%compared to  $60.00Underwear Weight:LightweightSize Type:RegularREI OUTLET Helly HansenLIFA Merino Midweight 2-In-1 Graphic Half-Zip Base Layer Top - Women's
$86.73 - $89.73Save 25% - 27%compared to  $120.00Underwear Weight:MidweightSize Type:RegularREI OUTLETHelly HansenVerglas Half-Zip Top - Women's
$63.73Save 25%compared to  $85.00Underwear Weight:LightweightSize Type:RegularREI OUTLETHelly HansenMerino Wool Base Layer Set - Kids'
$82.73Save 31%compared to  $120.00Underwear Weight:LightweightSize Type:RegularREI OUTLETArtilectDarkhorse 185 Zoned Quarter-Zip Base Layer Top - Women's
$116.73Save 31%compared to  $170.00Underwear Weight:MidweightSize Type:RegularREI OUTLETArtilectDarkhorse 185 Zoned Crew Base Layer Top - Women's
$109.73Save 31%compared to  $160.00Underwear Weight:MidweightSize Type:RegularREI OUTLET- Top Rated
ArtilectDarkhorse 185 Zoned Crew Base Layer Top - Men's
$109.73Save 31%compared to  $160.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET - Top Rated
IcebreakerMerino 200 Sonebula Long-Sleeve Crewe Base Layer Top - Men's
$89.73Save 25%compared to  $120.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLET - Top Rated
IcebreakerMerino 125 ZoneKnit Long-Sleeve Half-Zip Base Layer Top - Men's
$99.73Save 26%compared to  $135.00Underwear Weight:LightweightSize Type:Regular, BigREI OUTLET SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Men's
$97.73Save 24%compared to  $130.00Underwear Weight:MidweightSize Type:Regular, BigREI OUTLETIcebreaker125 ZoneKnit Long-Sleeve Crewe Base Layer Thermal Top - Women's
$93.73Save 25%compared to  $125.00Underwear Weight:LightweightSize Type:RegularREI OUTLET- Top Rated
Icebreaker125 ZoneKnit Merino Long-Sleeve Crewe Thermal Top - Men's
$93.73Save 25%compared to  $125.00Underwear Weight:UltralightweightSize Type:Regular, BigREI OUTLET - New arrival
SmartwoolClassic Thermal Merino Base Layer Quarter-Zip - Women's
$89.73Save 25%compared to  $120.00Underwear Weight:MidweightSize Type:Regular, PlusREI OUTLET Helly HansenLIFA Merino Midweight Half-Zip Base Layer Top - Women's
$79.73 - $82.73Save 24% - 27%compared to  $110.00Underwear Weight:MidweightSize Type:RegularREI OUTLET- New arrival
Kari TraaAlma Half-Zip Base Layer Top - Women's
$59.73Save 25%compared to  $80.00Underwear Weight:UltralightweightSize Type:RegularREI OUTLET IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Thermal Base Layer Top - Kids'
$52.73Save 29%compared to  $75.00Underwear Weight:MidweightSize Type:RegularREI OUTLETSpraywayEffra Hoody Base Layer Top - Women's
$49.73Save 28%compared to  $69.95Underwear Weight:HeavyweightSize Type:Regular, PlusREI OUTLETHelly HansenLIFA ACTIVE Graphic Crew Base Layer Top - Women's
$46.73Save 28%compared to  $65.00Underwear Weight:LightweightSize Type:RegularREI OUTLETSpraywayEffra Crew Base Layer Top - Women's
$36.73Save 26%compared to  $49.95Underwear Weight:HeavyweightSize Type:Regular, PlusREI OUTLET- New arrival
SmartwoolClassic Thermal Merino Base Layer Quarter-Zip - Kids'
$52.73Save 24%compared to  $70.00Underwear Weight:MidweightSize Type:RegularREI OUTLET - New arrival
SaxxRoast Master Midweight Long-Sleeve Crew Base Layer Top - Men's
$52.73Save 29%compared to  $75.00Underwear Weight:MidweightSize Type:Regular, BigREI 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- New arrival
IcebreakerMerino 260 Tech Long Sleeve Crewe Base Layer Top - Men's
$119.73Save 27%compared to  $165.00Underwear Weight:HeavyweightSize Type:Regular, BigREI OUTLET
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