SockGuy’s mid-weight MTN-tech Hiker keeps adventurous feet dry and friction-free which is key to staying blister-free on the trail. The itch-free performance of Isolwool® combines the year-round thermal protection of Merino wool and water-repellent abrasion resistance of Polypropylene. Together these fibers work to pull moisture away from your skin to the outside of the sock. This keeps the next to skin surface drier and temperature protected even if the trail gets soggy. They have added extra LUV to their signature Cool Comfort Formula with targeted terry padding and an extra dose of Olefin in the high-impact boot covered zone increasing the volume and speed of moisture transfer. This creates a friction-free, fast drying environment reliable for multi-day trail adventures. Features: • Made with 75% IsolWOOL, 12% Nylon, 10% Spandex and 3% Olefin for exceptional comfort and strength.