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Hiking Underwear Mens

(181 products)

Products (181)

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CraftCORE Dry Active Comfort Base Layer Top - Men's
$39.73
Save 38%
compared to $64.95
Save up to 30% extra on your REI Outlet purchase
0 reviews
REI OUTLET
StanceSpeakeazy Boxer Briefs - Men's
$19.73
Save 26%
compared to $27.00
Save up to 30% extra on your REI Outlet purchase
0 reviews
REI OUTLET
StanceDockerson Boxer Briefs - Men's
$19.73
Save 34%
compared to $30.00
Save up to 30% extra on your REI Outlet purchase
0 reviews
REI OUTLET
StanceKahala Wholester Boxer Briefs - Men's
$24.73
Save 29%
compared to $35.00
Save up to 30% extra on your REI Outlet purchase
1 reviews with an average rating of 5.0 out of 5 stars
REI OUTLET
StanceButter Blend Boxers - Men's
$22.73
Save 24%
compared to $30.00
Save up to 30% extra on your REI Outlet purchase
1 reviews with an average rating of 5.0 out of 5 stars
REI OUTLET
StanceCasa Playa Boxer Briefs - Men's
$19.73
Save 26%
compared to $27.00
Save up to 30% extra on your REI Outlet purchase
0 reviews
REI OUTLET
SmartwoolIntraknit Thermal Merino Pattern Crew Base Layer Top - Men's
$90.73
Save 30%
compared to $130.00
Save up to 30% extra on your REI Outlet purchase
2 reviews with an average rating of 4.5 out of 5 stars
REI OUTLET
StanceTri Angular Wholester Boxer Briefs - Men's
$24.73
Save 29%
compared to $35.00
Save up to 30% extra on your REI Outlet purchase
0 reviews
REI OUTLET
StanceBlock It Out Wholester Boxer Briefs - Men's
$24.73
Save 29%
compared to $35.00
Save up to 30% extra on your REI Outlet purchase
0 reviews
REI OUTLET
StanceTakawitz Boxer Briefs - Men's
$19.73
Save 34%
compared to $30.00
Save up to 30% extra on your REI Outlet purchase
2 reviews with an average rating of 5.0 out of 5 stars
REI OUTLET
New arrival
StancePlaya Larga Boxer Briefs - Men's
$18.73
Save 25%
compared to $25.00
Save up to 30% extra on your REI Outlet purchase
0 reviews
REI OUTLET
ArtilectFlatiron 185 Base Layer Leggings - Men's
$109.73
Save 31%
compared to $160.00
Save up to 30% extra on your REI Outlet purchase
0 reviews
REI OUTLET
New arrival
Free FlyElevate Boxer Briefs - Men's
$28.73
Save 24%
compared to $38.00
Save up to 30% extra on your REI Outlet purchase
0 reviews
REI OUTLET
StanceInvestor Boxer Briefs - Men's
$22.73
Save 24%
compared to $30.00
Save up to 30% extra on your REI Outlet purchase
3 reviews with an average rating of 4.7 out of 5 stars
REI OUTLET
Top Rated
Icebreaker260 ZoneKnit Base Layer Leggings - Men's
$119.73
Save 27%
compared to $165.00
Save up to 30% extra on your REI Outlet purchase
9 reviews with an average rating of 4.8 out of 5 stars
REI OUTLET
Top Rated
IcebreakerMerino 260 Tech Thermal Base Layer Leggings With Fly - Men's
$93.73
Save 25%
compared to $125.00
Save up to 30% extra on your REI Outlet purchase
34 reviews with an average rating of 4.8 out of 5 stars
REI OUTLET
StanceSanta Rips Boxer Briefs - Men's
$22.73
Save 35%
compared to $35.00
Save up to 30% extra on your REI Outlet purchase
0 reviews
REI OUTLET
SmartwoolIntraknit Active Base Layer Crew Shirt - Men's
$81.73
Save 25%
compared to $110.00
Save up to 30% extra on your REI Outlet purchase
1 reviews with an average rating of 4.0 out of 5 stars
REI OUTLET
StancePalmoflage Boxer Briefs - Men's
$19.73
Save 34%
compared to $30.00
Save up to 30% extra on your REI Outlet purchase
4 reviews with an average rating of 4.5 out of 5 stars
REI OUTLET
CraftCore Dry Active Comfort Base Layer Pants - Men's
$32.73
Save 34%
compared to $49.95
Save up to 30% extra on your REI Outlet purchase
0 reviews
REI OUTLET
ArtilectFlatiron 185 Crew Base Layer Top - Men's
$96.73 - $109.73
Save 30% - 31%
compared to $140.00 - $160.00
Save up to 30% extra on your REI Outlet purchase
0 reviews
REI OUTLET
StanceWebbed Boxer Briefs - Men's
$19.73
Save 26%
compared to $27.00
Save up to 30% extra on your REI Outlet purchase
0 reviews
REI OUTLET
Top Rated
Icebreaker200 ZoneKnit Long-Sleeve Crewe Base Layer Thermal Top - Men's
$109.73
Save 26%
compared to $150.00
Save up to 30% extra on your REI Outlet purchase
6 reviews with an average rating of 5.0 out of 5 stars
REI OUTLET
Top Rated
SmartwoolClassic Thermal Merino Base Layer Quarter-Zip - Men's
$89.73
Save 25%
compared to $120.00
Save up to 30% extra on your REI Outlet purchase
15 reviews with an average rating of 4.9 out of 5 stars
REI OUTLET
StancePalmer Boxer Briefs - Men's
$18.73
Save 25%
compared to $25.00
Save up to 30% extra on your REI Outlet purchase
0 reviews
REI OUTLET
IcebreakerMerino 260 Tech Long Sleeve Crewe Base Layer Top - Men's
$119.73
Save 27%
compared to $165.00
Save up to 30% extra on your REI Outlet purchase
3 reviews with an average rating of 4.3 out of 5 stars
REI OUTLET
Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Thermal Base Layer Top - Men's
$99.73
Save 26%
compared to $135.00
Save up to 30% extra on your REI Outlet purchase
33 reviews with an average rating of 4.6 out of 5 stars
REI OUTLET
Top Rated
IcebreakerMerino 200 Sonebula Long-Sleeve Crewe Base Layer Top - Men's
$89.73
Save 25%
compared to $120.00
Save up to 30% extra on your REI Outlet purchase
6 reviews with an average rating of 4.5 out of 5 stars
REI OUTLET
SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Men's
$97.73
Save 24%
compared to $130.00
Save up to 30% extra on your REI Outlet purchase
9 reviews with an average rating of 4.1 out of 5 stars
REI OUTLET
Top Rated
Arc'teryxRho LT Base Layer Hoody - Men's
$96.93
Save 19%
compared to $120.00
46 reviews with an average rating of 5.0 out of 5 stars