Scientific Progressive Compression TechnologyPlus Size Compression Socks 20-30 mmHg 3 intervals of progressive compression provide maximum ankle compression to the leg, tapering from the calf up towards the heart. Scientifically engineered to help reduce and prevent wearer swelling, maintain active circulation and leg health. High Quality Compression SocksPlus Size Compression Socks Fine Textile Technology, High Quality Textile Socks. The three-dimensional heel design of the varicose compression stockings is breathable and comfortable. Compression stockings are made of 80% nylon and elastane, which do not compress the feet, are elastic, and have a long service life. Large Size Design Plus Size Compression Socks are suitable for plus size calves. Calf Compression Socks give you great leg support and long-lasting progressive compression, while being lightweight and breathable, providing great comfort for men and women with wide calves. (Note: Please measure your calf and ankle circumference before purchasing, and choose the right size according to the size chart.)