100% Nylon Imported Reduce Calf Pain& Faster Recovery-The strongest compression in the ankle area not only Reduce cramping, fatigue, swelling, but also help muscle recovery, varicose veins and diabetic Better Blood Circulation-The strongest 20 - 30 mmHg compression in the ankle area will promote blood circulation and oxygen flow. Reduce the accumulation of lactic acid, reduce muscle fatigue during exercise. Comfortable&Durable:The compression socks made of power+ premium performance nylon fabric. The superior grade circular knit structure delivers 360-degree stretch for greater flexibility. The toe area wont squeeze your aching toe joints,very comfortable. Perfect for Medical&Althetic Sides: Suitable for Edema, Diabetic, Varicose Veins, Pregnancy, Reduce Shin Splints, Nursing.Also a best gift for sport fans.Such as: Runners, Joggers, Basketball Player, Football Player, Travelers, Marathon, Cross Training,Gym Workouts,Hiking, Trekking Item Quantity : 1 Pair Material: Nylon/Chinlon Men shoes Size: S/M 7-8.5 L/XL 9-14 XXL 14-18 Women shoes size: S/M 5.5-6.5 L/XL 9-14 XXL 14-18 Ankle(A)& Calf(C) circumference Measurements: S/M: A=6.5"-8.5" C=10.5" -14" L/XL: A=8"-9.5" C=11.5"-15" Note: What is the conversion between inch and cm? 1 inch = 2.54cm (1"=2.54cm) 1cm = 0.4 inches (1cm=0.4")