loaded 17 results

Sun-Protective Fabric Boys' Underwear

(17 products)

Products (17)

Sort: Best Match

Top Rated
REI Co-opMidweight Base Layer Crew Top - Kids'
$34.95
6 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Top Rated
REI Co-opMidweight Base Layer Bottoms - Kids'
$34.95
8 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Top Rated
REI Co-opMerino Midweight Base Layer Crew Top - Kids'
$49.95
28 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Top Rated
REI Co-opMidweight Base Layer Crew Top - Toddlers'
$24.95
15 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
BurtonFleece Base Layer Set - Toddlers'
$64.95
0 reviews
Underwear Weight:
Heavyweight
Size Type:
Regular
Top Rated
REI Co-opMidweight Base Layer Bottoms - Toddlers'
$24.95
8 reviews with an average rating of 4.9 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Top Rated
REI Co-opMerino Midweight Base Layer Bottoms - Kids'
$49.95
16 reviews with an average rating of 4.6 out of 5 stars
Underwear Weight:
Midweight
Size Type:
Regular
Top Rated
REI Co-opLightweight Base Layer Bottoms - Kids'
$20.93
Save 30%
compared to $29.95
10 reviews with an average rating of 4.7 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
Hot ChillysOriginals Solid Base Layer Crew - Kids'
$34.73
Save 26%
compared to $47.50
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
BurtonFleece Base Layer Set - Toddlers'
$64.95
0 reviews
Underwear Weight:
Heavyweight
Size Type:
Regular
Hot ChillysPeach Skins Crew Base Layer Top- Kids'
$29.73
Save 33%
compared to $45.00
1 reviews with an average rating of 5.0 out of 5 stars
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
Hot ChillysOriginals Print Base Layer Pants - Kids'
$39.73
Save 27%
compared to $55.00
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET
Hot ChillysPeach Skins T-Neck Base Layer Top - Kids'
$32.73
Save 34%
compared to $50.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
Hot ChillysPeach Skins Base Layer Bottoms - Kids'
$29.73
Save 33%
compared to $45.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
New arrival
Terramar2.0 Thermapeak Base Layer Pants - Kids'
$16.73
Save 33%
compared to $25.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
New arrival
Terramar2.0 Thermolator Crew Base Layer Top - Kids'
$24.73
Save 29%
compared to $35.00
0 reviews
Underwear Weight:
Lightweight
Size Type:
Regular
REI OUTLET
Hot ChillysOriginals Print Base Layer Crew - Kids'
$39.73
Save 27%
compared to $55.00
0 reviews
Underwear Weight:
Midweight
Size Type:
Regular
REI OUTLET

Sort: Best Match

Related Expert Advice articles

What material is best?

Wool is moisture-wicking and odor-resistant, while synthetic fabrics are more durable and less expensive.

Match the temp to the trek

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

Find your fit

To be able to wick sweat efficiently, your next-to-skin layer needs to actually be next to your skin. A comfortably snug fit everywhere is your goal.

Read full article: How to Choose Base Layers