The ALPINT MOUNTAIN Aiermont Runner 4.0 Marathon socks are designed for serious runners and outdoor enthusiasts. Made from REPREVE® recycled polyester fiber, these mid-calf running socks offer smart temperature control, moisture-wicking, and sweat-absorbing properties to keep your feet dry and comfortable during long runs. Engineered for trail and marathon performance, these men’s sports socks feature a low-top cylinder height for a snug fit. With a blend of 85% polyester, 8% nylon, and 7% spandex, they provide durability, flexibility, and support for every step on the trail or track.