PERFORMANCE FIT: These Peaks RFL ultra-lightweight ski socks are designed with a performance fit to prevent slipping and bunching, ensuring all-day comfort. They feature fatigue-easing arch support, multi-zone mesh panels for improved venting and flexibility, and reinforced Achilles and footbeds for superior durability. Ideal for aggressive skiing or snowboarding, these boot socks for women provide exceptional comfort and support. OVER-THE-CALF SOCK HEIGHT: These women's over-the-calf socks average 16.25 inches from heel to cuff, rising just below the knee, making them perfect for ski boots, snowboard boots, and winter boots. Their height ensures full coverage and protection for the lower leg. COMPOSITION: Composed of 55% Nylon, 42% Merino Wool, and 3% Lycra Spandex, these merino wool socks offer a perfect blend of durability, comfort, and elasticity. Merino Wool's natural ability to move heat and moisture keeps feet warm and dry, suitable for all-day wear in versatile weather conditions. Guaranteed for Life - If these socks wear, tear, or develop holes, Darn Tough will replace them. No strings. No conditions. Made in the USA with yarns from America and around the globe - Every pair of socks is knit in Vermont - the perfect testing ground for the finest premium all weather performance socks.