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Wear them under your hiking socks as a barrier against chafing, or wear them alone on hot day hikes. The REI Co-op COOLMAX EcoMade liner socks are moisture-wicking, breathable and durable.

Designed for comfort, added warmth in your hiking boots and trail-mileage practicality, wear Bridgedale Everyday / Boot Liner socks solo or as liners, based on your needs and outside temperatures.

Wear these light and breathable liner socks under thicker outer socks as a first line of defense against moisture and blisters, or wear them alone as your go-to socks for everyday adventures.

Wear 'em under your hiking socks to reduce friction on multiday trips, or wear 'em alone for summer day hikes. The REI Co-op Merino Wool liner socks put a layer of comfort between you and the trail.

Wear the REI Co-op Silk liner crew socks under your hiking socks to protect your feet from blisters. Or wear them alone because they're strong, cool and moisture-absorbent for comfort on hot trails.