Solidea Relax Unisex Knee High 140 Den Dark Blue Graduated Compression 18-22 mmHg Strong graduated compression (18/23 mmHg) to promote venous and lymphatic return. Indicated for edema, varicose veins, lymphedema and DVT prevention. High percentage of cotton (45%) in contact with the skin: natural comfort. Anti-stress insole for long-lasting foot relief. Unisex, elegant and high-performance: perfect for every daily need.