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Men's Underwear: Deals

(93 products)

Products (93)

Sort: Best Match

tasc PerformanceElevation Merino Base Layer Bottoms - Men's
$34.73 - $54.73
Save 30% - 56%
compared to $79.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
36 reviews with an average rating of 3.8 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
REI OUTLET
tasc PerformanceElevation Merino T-Shirt - Men's
$34.73 - $54.73
Save 30% - 56%
compared to $79.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
45 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
REI OUTLET
New arrival
TerramarPerformance Briefs - Men's - Package of 3
$19.73
Save 34%
compared to $30.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
1 reviews with an average rating of 5.0 out of 5 stars
Size Type:
Regular, Big
REI OUTLET
Top Rated
REI Co-opLightweight Long-Sleeve Crew Base Layer Top - Men's
$27.93 - $39.95
25 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big, Tall
Top Rated
SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Men's
$66.93 - $90.00
77 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
SaxxVolt Breathable Mesh Boxer Briefs - Men's
$26.73
Save 23%
compared to $35.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
6 reviews with an average rating of 4.0 out of 5 stars
Size Type:
Regular, Big
REI OUTLET
Top Rated
IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Men's
$78.73
Save 25%
compared to $105.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
74 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Big, Regular
REI OUTLET
SaxxQuest Boxer Briefs - Men's
$24.73
Save 27%
compared to $34.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
3 reviews with an average rating of 4.7 out of 5 stars
Size Type:
Regular, Big
REI OUTLET
SaxxVibe Xtra Soft Comfort Boxer Briefs - Men's
$24.73
Save 27%
compared to $34.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
0 reviews
Size Type:
Regular, Big
REI OUTLET
New arrival
Helly HansenHH Durawool Crew Long-Sleeve Base Layer Top - Men's
$64.73
Save 28%
compared to $90.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular, Big
REI OUTLET
SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Men's
$92.73
Save 28%
compared to $130.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
10 reviews with an average rating of 4.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
REI OUTLET
Top Rated
Arc'teryxRho Insulated 3/4 Base Layer Bottoms - Men's
$159.73
Save 20%
compared to $200.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
12 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Heavyweight
Size Type:
Regular, Big
REI OUTLET
SmartwoolIntraknit Thermal Merino Base Layer Colorblock Crew - Men's
$96.73
Save 25%
compared to $130.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
11 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
REI OUTLET
New arrival
Terramar2.0 Thermolator Base Layer Pants - Men's
$32.73
Save 27%
compared to $45.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular, Big
REI OUTLET
Top Rated
REI Co-opLightweight Half-Zip Base Layer Top - Men's
$29.93 - $44.95
15 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
StanceGood Times Boxer Briefs - Men's - Package of 2
$29.73
Save 33%
compared to $45.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
0 reviews
Size Type:
Regular
REI OUTLET
Free CountryForce Grid Fleece Base Layer Bottoms - Men's
$29.73
Save 33%
compared to $45.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
8 reviews with an average rating of 3.6 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
REI OUTLET
Top Rated
IcebreakerMerino 125 ZoneKnit Long-Sleeve Half-Zip Base Layer Top - Men's
$99.73
Save 26%
compared to $135.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
13 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
REI OUTLET
Top Rated
REI Co-opLightweight Crew Base Layer Top - Men's
$19.93 - $29.95
23 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
SmartwoolEveryday 6" Knit Boxer Briefs - Men's
$35.73
Save 25%
compared to $48.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
5 reviews with an average rating of 2.2 out of 5 stars
Size Type:
Regular
REI OUTLET
Top Rated
ExOfficio9" GNG Sport 2.0 Boxer Briefs - Men's
$24.73
Save 27%
compared to $34.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
529 reviews with an average rating of 4.7 out of 5 stars
Size Type:
Regular
REI OUTLET
SaxxRoast Master Midweight Base Layer Bottoms - Men's
$47.73
Save 36%
compared to $75.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
REI OUTLET
Free FlyElevate Boxer Briefs - Men's
$28.73
Save 24%
compared to $38.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
63 reviews with an average rating of 4.0 out of 5 stars
Size Type:
Regular, Big
REI OUTLET
IcebreakerMerino 200 ZoneKnit Long-Sleeve Half-Zip Base Layer Top - Men's
$119.73
Save 25%
compared to $160.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular, Big
REI OUTLET
StanceRome Boxer Briefs - Men's
$16.73
Save 33%
compared to $25.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
0 reviews
Size Type:
Regular
REI OUTLET
SmartwoolIntraknit Active Base Layer Bottoms - Men's
$81.73
Save 25%
compared to $110.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
2 reviews with an average rating of 4.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Big, Regular
REI OUTLET
StanceStacks Boxer Briefs - Men's
$16.73
Save 33%
compared to $25.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
0 reviews
Size Type:
Regular
REI OUTLET
Top Rated
Free CountryForce Grid Fleece Base Layer Top - Men's
$29.73
Save 33%
compared to $45.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
8 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Big
REI OUTLET
Top Rated
Icebreaker200 Sonebula Leggings - Men's
$89.73
Save 25%
compared to $120.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
5 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
REI OUTLET
Free CountryCloud Knit Crewneck Base Layer Top - Men's
$26.73
Save 33%
compared to $40.00
Save up to 30% extra on your REI Outlet purchase, thru 12/16.
3 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
REI OUTLET