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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REI Co-op Girls' Underwear: Deals
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REI Co-op Lightweight Crew Long Underwear Top - Kids'
$20.93Save 30%compared to $29.95 - Colors
REI Co-op Lightweight Long Underwear Bottoms - Kids'
$20.93Save 30%compared to $29.95 - Colors
REI Co-op Lightweight Long Underwear Bottoms - Infants'/Toddlers'
$13.93Save 30%compared to $19.95 - Colors
REI Co-op Lightweight Crew Long Underwear Top - Infants'/Toddlers'
$13.93Save 30%compared to $19.95 - ColorsTop Rated
REI Co-op Merino Midweight Base Layer Top - Kids'
$34.93 - $49.95 - Colors
REI Co-op Merino Midweight Base Layer Bottoms - Kids'
$34.93 - $49.95
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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.
