Energy sock has comfortable knit around the ankle. The sock is very elastic and is sturdy on the foot. Reinforcements on the toe and heel, fringed sole and instep protection make this a perfect sock for high energy activities. Energy Low sock has reflective yarn woven in to give increased visibility. * Super Soft * Easy Care * Mulesing free - animal welfare * Odour-free * Renewable * Silicone free - care for nature Fabric: 48% merino wool, 44% polyamide, 5% nylon nanoglide, 3% elastane