1. Pressure socks, material: nylon + nylon, weight: 62g. Size: Foot size calf size S / M EU35-39 24-30cm L / XL EU40-43 31-37CM XXL EU44-47 38-44CM 2. Promote the blood circulation of the legs through the natural attributes of copper fibers. 3. Adopt unique materials. Breathable moisture wicking fabric, keep cool, exclude odor. 4. Helps to reduce the pain and discomfort caused by footprint inflammation, reduce fatigue, sore, cramps, and prevent injuries. 5. Suitable for travel, exercise or work for a long time.