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Blue Men's Underwear

(51 products)

Products (51)

Sort: Best Match

Sale Ends May 25
SmartwoolMerino Boxer Briefs - Boxed - Men's
$37.49
Save 25%
compared to $50.00
1 reviews with an average rating of 3.0 out of 5 stars
Size Type:
Big
Sale Ends May 25
REI Co-opEveryday Boxers - Men's
$18.69
Save 25%
compared to $24.95
140 reviews with an average rating of 4.2 out of 5 stars
Size Type:
Regular, Big
SaxxQuest Quick-Dry Boxer Briefs - Men's
$34.00
14 reviews with an average rating of 4.4 out of 5 stars
Size Type:
Regular, Big
Sale Ends May 25
REI Co-opMerino Boxers - Men's
$29.89
Save 25%
compared to $39.95
82 reviews with an average rating of 4.3 out of 5 stars
Size Type:
Regular, Big
Sale Ends May 25
Top Rated
REI Co-opMidweight Base Layer Bottoms - Men's
$41.19
Save 25%
compared to $54.95
105 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big, Tall
Top Rated
SmartwoolClassic Thermal Merino Crew Base Layer Top - Men's
$84.73
Save 26%
compared to $115.00
319 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
REI OUTLET
Sale Ends May 25
Top Rated
SmartwoolClassic All-Season Merino Long-Sleeve Base Layer Top - Men's
$74.99
Save 25%
compared to $100.00
106 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Sale Ends May 25
Top Rated
REI Co-opMidweight Base Layer Half-Zip Top - Men's
$44.89
Save 25%
compared to $59.95
194 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big, Tall
Sale Ends May 25
Top Rated
REI Co-opMidweight Long-Sleeve Base Layer Top - Men's
$41.19
Save 25%
compared to $54.95
213 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big, Tall
SaxxVolt Breathable Mesh Boxer Briefs - Men's
$26.73
Save 23%
compared to $35.00
12 reviews with an average rating of 4.2 out of 5 stars
Size Type:
Regular
REI OUTLET
StanceFlower Flora Boxer Briefs - Men's
$16.73
Save 33%
compared to $25.00
0 reviews
Size Type:
Regular
REI OUTLET
SmartwoolIntraknit Thermal Merino Crew Base Layer Top - Men's
$59.83 - $112.49
Save 25% - 60%
compared to $150.00
209 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
StanceCheck Me Out Boxer Briefs - Men's
$19.73
Save 34%
compared to $30.00
0 reviews
Size Type:
Regular
REI OUTLET
ExOfficioEveryday Briefs - Men's
$16.73
Save 35%
compared to $26.00
282 reviews with an average rating of 4.1 out of 5 stars
Size Type:
Big
REI OUTLET
PatagoniaCapilene Midweight Zip-Neck Base Layer Top - Men's
$78.93
Save 20%
compared to $99.00
81 reviews with an average rating of 4.4 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Top Rated
Arc'teryxRho LT Crew Neck Base Layer Top - Men's
$100.00
45 reviews with an average rating of 4.8 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Top Rated
PatagoniaCapilene Midweight Crew Base Layer Top - Men's
$70.93
Save 20%
compared to $89.00
93 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Sale Ends May 25
SmartwoolClassic All-Season Merino T-Shirt - Men's
$71.19
Save 25%
compared to $95.00
111 reviews with an average rating of 4.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Sale Ends May 25
Top Rated
SmartwoolClassic Thermal Merino Quarter-Zip Base Layer Top - Men's
$97.49
Save 25%
compared to $130.00
63 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Sale Ends May 25
Top Rated
IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Men's
$89.99
Save 25%
compared to $120.00
231 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Sale Ends May 25
SmartwoolIntraknit AS Merino Base Layer Bottoms - Men's
$93.69
Save 25%
compared to $125.00
2 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Top Rated
SmartwoolClassic Thermal Merino Base Layer Quarter-Zip - Men's
$89.73
Save 25%
compared to $120.00
63 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
REI OUTLET
Top Rated
Arc'teryxRho LT Zip-Neck Base Layer Top - Men's
$120.00
111 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular, Big
Sale Ends May 25
Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Half-Zip Base Layer Top - Men's
$101.19
Save 25%
compared to $135.00
51 reviews with an average rating of 4.5 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big
Lorem

Lorem

Get $130 in value

When approved for the REI Co-op Mastercard by May 25, you’ll get $30 in card rewards. Plus, you can earn a $100 REI gift card after your first non-REI purchase within 60 days from account opening. Terms apply.
Apply now
StanceBotanical Bliss Wholester Boxer Briefs - Men's
$24.73
Save 29%
compared to $35.00
0 reviews
Size Type:
Regular
REI OUTLET
StanceTorn Stripe Wholester Boxer Briefs - Men's
$24.73
Save 29%
compared to $35.00
0 reviews
Size Type:
Regular
REI OUTLET
Top Rated
SaxxQuest Quick-Dry Boxer Briefs - Men's - Package of 2
$61.00
19 reviews with an average rating of 4.9 out of 5 stars
Size Type:
Regular, Big
StanceCompression Nylon Boxer Briefs - Men's
$26.73
Save 31%
compared to $39.00
3 reviews with an average rating of 4.3 out of 5 stars
Size Type:
Regular
REI OUTLET
Top Rated
SaxxVibe Xtra Soft Comfort Boxer Briefs - Men's
$22.73
Save 33%
compared to $34.00
26 reviews with an average rating of 4.9 out of 5 stars
Size Type:
Regular
REI OUTLET
Sale Ends May 25
Icebreaker200 Oasis Crewe Base Layer Top - Men's
$82.49
Save 25%
compared to $110.00
49 reviews with an average rating of 4.3 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular, Big

1–30 of 51 products

Sort: Best Match

Related Expert Advice articles

Fabrics

Synthetic: moisture-wicking, quick drying, durable, but can hold on to odor
Wool: moisture-wicking, odor-resistant, cooling in warm weather, can be less durable

Styles

Bikini: less rear coverage, thinner waistband, higher-cut leg
Briefs (women's): full-cut briefs offer more coverage in front and back; hipsters offer medium front coverage and back with higher rise
Briefs (men's): close fit and good support, but less thigh coverage
Boxer brief or boy shorts: snug fit, good coverage, longer cut extends down to the upper thigh
Boxers: looser fit, added coverage can prevent chafing but prone to bunching
Thongs: lightweight and quick-drying but provide the least coverage
Sports bras: compression and support during high-output activities like hiking and running

Read full article: How to Choose Hiking Underwear

Which material is best?

Wool: highly moisture-wicking and odor-resistant
Synthetic: durable and less expensive
Silk: soft and lightweight for casual activities

Match the temp to the trek

Lightweight layers: best for moderate to cool temperatures
Midweight layers: best for cold temperatures
Heavyweight layers: best for below-freezing temperatures

Find your fit

Must be close to skin to efficiently wick sweat; should fit comfortably snug
Base layer is for moisture control; your mid layer is for warmth

Read full article: How to Choose Base Layers

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