60% merino wool, 30% nylon, 10% lycra
This compression sock has a 4-inch ankle-support cuff which sits at the three-quarter calf level.
Merino Wool, nature's original technical fiber, has proven insulating and wicking qualities. It keeps the skin dryer when sweating and cooler when hot. Swiftwick uses a 18-gauge New Zealand Merino Wool with 3-inch minimum staple length strands for its soft finish, no-itch feel, and durability. Merino Wool is the most hydrophilic of all natural fibers, absorbing as much as 30 percent of its weight without feeling wet; however, its hydrophobic exterior with smoother scales-yes, wool has scales--allows for a softer and dryer feel.