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Kids Thermal Underwear

(20 products)

Products (20)

Sort: Best Match

Top Rated
REI Co-opMidweight Base Layer Bottoms - Kids'
$34.95
14 reviews with an average rating of 4.7 out of 5 stars
Top Rated
REI Co-opMidweight Base Layer Crew Top - Kids'
$34.95
8 reviews with an average rating of 4.9 out of 5 stars
Top Rated
REI Co-opMerino Midweight Base Layer Crew Top - Kids'
$49.95
32 reviews with an average rating of 4.8 out of 5 stars
Hot ChillysOriginals Solid Base Layer Crew - Kids'
$34.73
Save 26%
compared to $47.50
Use code OUTFEB26 for $20 off when you spend $100+ at REI Outlet.
0 reviews
REI OUTLET
SmartwoolClassic Thermal Merino Base Layer Bottoms - Kids'
$65.00
0 reviews
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
SmartwoolClassic Thermal Merino Base Layer Quarter-Zip Top - Kids'
$51.93 - $70.00
0 reviews
Top Rated
REI Co-opMidweight Base Layer Bottoms - Toddlers'
$24.95
9 reviews with an average rating of 4.8 out of 5 stars
Helly HansenGraphic Lifa Merino Base Layer Set - Kids'
$74.73
Save 32%
compared to $110.00
Use code OUTFEB26 for $20 off when you spend $100+ at REI Outlet.
1 reviews with an average rating of 1.0 out of 5 stars
REI OUTLET
The North FaceDotKnit Thermal Base Layer Set - Kids'
$80.00
8 reviews with an average rating of 3.9 out of 5 stars
Deux par DeuxThermal Underwear Base Layer Set - Kids'
$49.93
Save 30%
compared to $72.00
0 reviews
BurtonFleece Base Layer Set - Kids'
$69.95
2 reviews with an average rating of 5.0 out of 5 stars
SmartwoolClassic Thermal Merino Crew Base Layer Top - Kids'
$47.93 - $65.00
6 reviews with an average rating of 3.7 out of 5 stars
Hot ChillysOriginals Print Base Layer Pants - Kids'
$39.73
Save 27%
compared to $55.00
Use code OUTFEB26 for $20 off when you spend $100+ at REI Outlet.
0 reviews
REI OUTLET
Top Rated
Icebreaker260 Tech Thermal Base Layer Leggings - Kids'
$70.00
10 reviews with an average rating of 5.0 out of 5 stars
Deux par DeuxThermal Underwear Base Layer Set - Toddlers'
$72.00
1 reviews with an average rating of 5.0 out of 5 stars
Terramar2.0 Thermolator Crew Base Layer Top - Kids'
$24.73
Save 29%
compared to $35.00
Use code OUTFEB26 for $20 off when you spend $100+ at REI Outlet.
0 reviews
REI OUTLET
Hot ChillysOriginals Print Base Layer Crew - Kids'
$39.73
Save 27%
compared to $55.00
Use code OUTFEB26 for $20 off when you spend $100+ at REI Outlet.
0 reviews
REI OUTLET
Top Rated
REI Co-opMidweight Base Layer Crew Top - Toddlers'
$24.95
16 reviews with an average rating of 4.8 out of 5 stars
New arrival
ObermeyerComfy Cozy Base Layer Set - Kids'
$42.73
Save 27%
compared to $59.00
Use code OUTFEB26 for $20 off when you spend $100+ at REI Outlet.
0 reviews
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

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