Moisture-wicking merino wool is a no-brainer on a hot and sweaty trail, but often a comfortable sock will slide around after a few miles, resulting in hot spots and worse. FITS engineers its wool-nylon-Lycra socks with an extra-deep heel pocket, contour-fitting toe pockets, and a snug fit around your ankle to prevent movement. They left our feet unscathed. And because I prefer a light hiking shoe (the Adidas Fast R GTX), the medium-low profile was just what I needed. $18
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