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Sun-Protective Fabric Men's Underwear

(28 products)

Products (28)

Sort: Best Match

Top Rated
REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's
$89.95
140 reviews with an average rating of 4.5 out of 5 stars
Top Rated
REI Co-opMidweight Base Layer Bottoms - Men's
$54.95
105 reviews with an average rating of 4.5 out of 5 stars
Top Rated
REI Co-opLightweight Base Layer Bottoms - Men's
$44.95
29 reviews with an average rating of 4.6 out of 5 stars
REI Co-opMerino 185 Base Layer Bottoms - Men's
$79.95
169 reviews with an average rating of 4.2 out of 5 stars
Top Rated
REI Co-opMidweight Base Layer Half-Zip Top - Men's
$59.95
195 reviews with an average rating of 4.6 out of 5 stars
REI Co-opLightweight Long-Sleeve Crew Base Layer Top - Men's
$44.95
42 reviews with an average rating of 4.4 out of 5 stars
Top Rated
REI Co-opMidweight Long-Sleeve Base Layer Top - Men's
$54.95
213 reviews with an average rating of 4.6 out of 5 stars
REI Co-opHeavyweight Merino Base Layer Half-Zip Top - Men's
$104.95
34 reviews with an average rating of 4.3 out of 5 stars
REI Co-opLightweight Half-Zip Base Layer Top - Men's
$49.95
24 reviews with an average rating of 4.4 out of 5 stars
Top Rated
REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's
$79.95
229 reviews with an average rating of 4.6 out of 5 stars
Top Rated
REI Co-opLightweight Crew Base Layer Top - Men's
$34.95
34 reviews with an average rating of 4.6 out of 5 stars
Top Rated
REI Co-opHeavyweight Merino Base Layer Bottoms - Men's
$99.95
21 reviews with an average rating of 4.7 out of 5 stars
Top Rated
IcebreakerMerino 200 Oasis Long-Sleeve Crewe Thermal Top - Men's
$120.00
231 reviews with an average rating of 4.6 out of 5 stars
Top Rated
IcebreakerMerino 200 Oasis Base Layer Leggings with Fly - Men's
$120.00
87 reviews with an average rating of 4.7 out of 5 stars
Top Rated
REI Co-opMerino 185 Long-Sleeve Half-Zip Base Layer Top - Men's Tall Sizes
$89.95
17 reviews with an average rating of 4.8 out of 5 stars
Top Rated
REI Co-opHeavyweight Merino Long-Sleeve Base Layer Crew Top - Men's
$99.95
50 reviews with an average rating of 4.5 out of 5 stars
REI Co-opMerino 185 Base Layer Bottoms - Men's Tall Sizes
$79.95
17 reviews with an average rating of 3.9 out of 5 stars
Top Rated
Icebreaker260 Merino Tech Thermal Leggings with Fly - Men's
$140.00
73 reviews with an average rating of 4.7 out of 5 stars
NRSH2Core Lightweight Union Suit - Men's
$109.95
0 reviews
NRSExpedition Weight Union Suit - Men's
$169.95
0 reviews
Top Rated
IcebreakerMerino 260 Tech Long-Sleeve Crewe Thermal Top - Men's
$125.00
80 reviews with an average rating of 4.7 out of 5 stars
Icebreaker200 Oasis Crewe Base Layer Top - Men's
$110.00
49 reviews with an average rating of 4.3 out of 5 stars
KUHLReactiv Lite Grid Long-Sleeve Crew Base Layer Top - Men's
$109.00
11 reviews with an average rating of 4.5 out of 5 stars
Top Rated
REI Co-opMerino 185 Long-Sleeve Base Layer Top - Men's Tall Sizes
$79.95
11 reviews with an average rating of 4.8 out of 5 stars
KUHLReactiv Lite Grid Quarter-Zip Base Layer Top - Men's
$119.00
12 reviews with an average rating of 4.3 out of 5 stars
Top Rated
KUHLReactiv Lite Grid Base Layer Bottoms - Men's
$99.00
5 reviews with an average rating of 4.6 out of 5 stars
TerramarC-Suite Mammoth Sherpa Fleece Mid-Layer Pants - Men's
$56.73
Save 29%
compared to $80.00
2 reviews with an average rating of 3.0 out of 5 stars
REI OUTLET
Arms of Andes300 Alpaca Wool Long-Sleeve Crew Base Layer Top - Men's
$49.83
Save 61% - 64%
compared to $130.00 - $140.00
14 reviews with an average rating of 3.9 out of 5 stars

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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