Well known for their five-toe design, Injinji's Outdoor Midweight Wool Crew Sock is made for running and hiking rugged trails in unpredictable weather. The famous five-toe design promotes natural foot splay and blister prevention with fabric surrounding all five of our toes. This sock is newly upgraded to a Merino Wool blend, so hikers and runners can enjoy the natural odor-resistance, moisture management, and temperature regulation of Merino wool with the added durability of nylon and the stretch of Lycra.