The Fox River Women's Wick Dry Alturas Ultra-Lightweight Liner Socks are designed to be worn under your regular trekking socks for added comfort and blister prevention. These liner socks are made from a blend of polyester, nylon, and spandex, offering moisture-wicking properties and a snug fit. The smooth, flat-knit construction reduces bulk and friction, while the contoured rib top and spandex compression zones ensure a secure fit. These ultra-lightweight liner socks are perfect for long hikes, backpacking trips, or any outdoor adventure. With their moisture-wicking properties and blister prevention design, the Fox River Women's Wick Dry Alturas Ultra-Lightweight Liner Socks are a great addition to your trekking gear.