Expertly crafted with luxurious merino wool, the Women's Cairn Lightweight Crew Hiking Sock features our innovative URfit™ System for enduring support and all-day comfort. The advanced Wick Dry® technology actively keeps your feet dry, preventing moisture buildup and allowing you to enjoy wearing them repeatedly. WICK DRY® URfit® 38% Nylon, 27% Merino Wool, 27% Acrylic, 6% Polyester, 2% Spandex Style #2558