Premium Material -Ecoey Merino Wool Performance Athletic Socks are made from premium Australian Merino Wool and Dry-Tech fibre, deliver max performance, fit and comfortable.Enhanced Durability - Wool Blend with high-tech moisture wicking fabric provides durability, socks will not shrink after multi-time washing. Reinforcement in heel and toe provide durability in high stress areas to improve product life.Extra Comfortable - The hand-link closure toe feature and cushion provides great comfort and prevent blister, reduce foot pain during sports or daily workout activities. Arch support prevents feet fatigue from intense actives.Mesh ventilation construction. makes sure breathability. Great for running, exercise training, hiking, fitness, tennis,workout activities and every day use. Deep Heel Pocket make more comfortable wear and prevent socks slip off.Superior Customer Services - These Merino Wool Running socks are size 9-11, fits US Women shoe size: 5.5-10.5. Ecoey care about every cents you spent. We will be happy to refund or change, buy it for worry-free.