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How to Choose Hiking Underwear
Your choice of underwear can have a big impact on your comfort while hiking. Learn what fabric, style, fit and features to look for.
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Sun-Protective Fabric Girls' Underwear
(13 products)Products (13)
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- Sale Ends Dec 24Colors
REI Co-opMidweight Crew Base Layer Top - Kids'
$20.89Save 40%compared to  $34.95 - Sale Ends Dec 24ColorsTop Rated
REI Co-opMerino Midweight Base Layer Bottoms - Kids'
$29.89Save 40%compared to  $49.95 - Sale Ends Dec 24Colors
REI Co-opMidweight Base Layer Bottoms - Kids'
$20.89Save 40%compared to  $34.95 - Sale Ends Dec 24ColorsTop Rated
REI Co-opMerino Midweight Base Layer Top - Kids'
$29.89Save 40%compared to  $49.95 - Sale Ends Dec 24Colors
REI Co-opMidweight Half-Zip Base Layer Top - Kids'
$23.89Save 40%compared to  $39.95 - Sale Ends Dec 24ColorsTop Rated
REI Co-opMidweight Crew Base Layer Top - Toddlers'
$14.89Save 40%compared to  $24.95 - Sale Ends Dec 24ColorsTop Rated
REI Co-opMidweight Base Layer Bottoms - Toddlers'
$14.89Save 40%compared to  $24.95 - Sale Ends Dec 24ColorsTop Rated
REI Co-opLightweight Crew Base Layer Top - Kids'
$17.89Save 40%compared to  $29.95 - Sale Ends Dec 24ColorsTop Rated
REI Co-opLightweight Base Layer Bottoms - Kids'
$17.89Save 40%compared to  $29.95 - Sale Ends Dec 24Colors
REI Co-opLightweight Base Layer Bottoms - Infants'/Toddlers'
$11.89Save 40%compared to  $19.95 - Sale Ends Dec 24ColorsTop Rated
REI Co-opLightweight Crew Base Layer Top - Infants'/Toddlers'
$11.89Save 40%compared to  $19.95 - Colors
Terramar2.0 Free Ride Heritage 2-Piece Set Base Layer Set - Toddlers'
$30.00 - $35.00 - Colors
Terramar2.0 Free Ride Heritage 2-Piece Set Base Layer Set - Kids'
$40.00
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What to Wear Hiking
Learn about clothes that can help you hike more comfortably, and get strategies for cutting the weight and bulk of clothing in your pack.
How to Choose Base Layers
Choosing the right underwear (base layer) is essential—learn how moisture-wicking materials, fabric weight and fit affect comfort in the outdoors.
What to Wear Backpacking
Learn which clothes to bring backpacking in order to keep your pack light while making sure you'll have everything you need.
Layering Basics
Learn the basics of layering clothing so you can stay comfortable outdoors. Includes info on base layers, middle layers and shell layers.