Make cold, clammy, fatigue-inducing conditions a non-issue and lock in warmth with Simms’ advanced Guide Midweight OTCs. Tailored for an anatomical women-specific fit, these smart socks are spun from a premium blend of fibers, starting with merino wool—for moisture management and anti-microbial performance—and finished with nylon, polyester, and LYCRA® stretch. Mid-weight over the calf engineering bolsters coverage while keeping you warm. Extended high-loft toes add warmth where it counts. And Right Angle® arch support improves overall ride across rugged trail and river conditions. Made in the USA.