Brand new! Black Knee-high Size Medium Size details: Women's shoe size 6-10/ Men's 4-9 Calf circumference 12-14" All-Day Comfort + Support Increase circulation Improve leg and foot comfort Relief from pain, aches, and fatigue Reduce soreness, swelling, and inflammation Improve Recovery and Endurance Reduce muscle recovery time Relief for muscle stiffness and pain Prevent strain, injury, and fatigue Decrease lactic acid build-up Increase Circulatory Health Helps prevent varicose veins Helps prevent DVT and blood clots Relief from discomfort associated with minor/moderate edema, CVI, and venous conditions. Energy for Everything You Do Sitting or standing for long periods Running, cycling, and training Working from home Post-workout recovery Roadtrips and Flights Pregnancy MEDIUM 15-20 mmHg Medium compression is the second most commonly used compression level. Medium Support- Shares the same attributes as light while helping with mild leg and ankle swelling + minor varicose and spider vein relief Commonly Used For- Travel, pregnancy, mild edema, spider veins and mild varicose veins. We consider this the perfect entry level sock, great for first time wearers and therapeutic users alike