MATERIAL: 70% polyester, 15% spandex, 10% elastic, 5% nylon. High quality polyester make our compression socks more durable and sturdy. SIZE CHART: S/M fits women shoe size 2-5.5/ men shoe size 2-5.5; L/XL fits women shoe size 5-9.5/ men shoe size 6-10; XXL fits women shoe size 9-13.5, men shoe size 9-13. PREMIUM CONSRTUCTION: Our graduated compression socks (20-30 mmHg) are popular with runners and preferred by trainers. Targeted compression & support zones are beneficial to relieve pain, and discomfort related to plantar fasciitis. High quality moisture wicking properties promptly perspire sweat away from our feet, keeping our feet dry and cool. COMFORTABLE & PERFECT FIT: Combined with high quality polyester and spandex, our compression socks are more ductile and cozy and never squeeze your aching toe joints. Elastic cuff would never strangle your calf. Cushioned design on sole and reinforced toe and heel provide secure and comfort for our feet and effectively prevent blisters and edema. EASE YOURSELF: It is clinically proven that our best athletic graduated compression socks (20-30mmHg) provide the ideal compression to offer the maximum boost to your blood circulation, reliving varicose veins, calf compression or other leg swelling issues. And our compression socks offer amazing shock absorption and guard against pressure and friction, reducing your fatigue and weariness. EXTENSIVE OCCASSIONS: Widely applied into running, hiking, jogging, soccer, exercise, cycling, athletics, medicine, daily work and so on, our compression socks are best sock choices for runners, hikers, joggers, workers, teachers, nurses, pregnant women, travelers, enthusiasts of indoor/ outdoor activities. Our compression socks are also best gifts for family members, beloved ones, workers and anyone on their feet all day and patients after surgery!