The Wigwam Stratus Fusion Crew Socks are the original sock and liner as one. Made of a Merino Wool/ Stretch Nylon/ Olefin/ Lycra Spandex blend, the Stratus Fusion Crew Socks offer excellent insulating and wicking properties with breathable, itch-free comfort. These Wigwam Outdoor Fusion Socks feature a fully integrated moisture repelling liner in the foot which negates the need for a separate liner and works to keep feet dry and comfortable. The Stratus Socks stay in place with a stay-put leg and foot hugging fit; and prevent irritation with a seamless toe closure. The Wigwam Stratus Fusion Crew Socks combine a sock and liner in one for everyday comfort.